Two trees, one common and one rare, are highlighted to increase public awareness of indigenous trees, while various " greening " activities are undertaken by schools, businesses and other organizations.

Two whole numbers m and n are called coprime if their greatest common divisor is 1 ; i. e., if there is no prime number that divides both of them.

Two of the most common polysaccharides are cellulose and glycogen, both consisting of repeating glucose monomers.

Two common bookkeeping systems used by businesses and other organizations are the single-entry bookkeeping system and the double-entry bookkeeping system.

Two versions of Blackwood are common: " standard " Blackwood, developed by Easley, and " Roman key card " or " RKC " Blackwood, named for the Italian team which invented it.

Two thirds of the chemical elements occur on Earth only as compounds, and in the remaining third, often the compound forms of the element are most common.

Two electric multiple unit s of the DBAG Class 423 | class 423 common in several German S-Bahn networks.

* Two clades are sisters if they have an immediate common ancestor.

Two common sources of DMT in the western US are Reed canary grass ( Phalaris arundinacea ) and Harding grass ( Phalaris aquatica ).

Two decades earlier the Royal and Parliamentary Titles Act 1927 had stated that the United Kingdom and the dominions were " equal in status, in no way subordinate one to another in any aspect of their domestic or external affairs, though united by common allegiance to the Crown, and freely associated as members of the British Commonwealth of Nations ".

Two regions are called adjacent if they share a common boundary that is not a corner, where corners are the points shared by three or more regions.

# On 15 September 1790, to his double first cousin Maria Teresa of the Two Sicilies ( 6 June 1772 – 13 April 1807 ), daughter of King Ferdinand I of the Two Sicilies ( both were grandchildren of Empress Maria Theresa and shared all of their other grandparents in common ), with whom he had twelve children, of whom only seven reached adulthood.

Two common examples are shareware and trialware.

Two common types of engineered design for anchoring floating structures include tension-leg and catenary loose mooring systems.

Two numbers are called relatively prime, or coprime if their greatest common divisor equals 1.

Two styles of hearse bodywork are common.

The most common size has 34 strings: Two octaves below middle C and two and a half above ( ending on A ), although folk or lever harps can usually be found with anywhere from 19 to 40 strings.

Two important aspects of a concise language are as follows: First, the most common words ( e. g., " a ", " the ", " I ") should be shorter than less common words ( e. g., " roundabout ", " generation ", " mediocre ",) so that sentences will not be too long.

Two most common forms of engine cooling are air-cooled and water cooled — most modern engines are water cooled.

Two million years ago, scientists believe, the jaguar and its closest relative, the similarly spotted leopard, shared a common ancestor in Asia.

Metals typically consist of close-packed atoms, meaning that the atoms are arranged like sphere Two packing motifs are common, one being body-centered cubic wherein each metal is surrounded by eight equivalent metals.

Two common examples used are:

Two types of light source were used, a thousand watt projection lamp and an AH6 high pressure mercury arc.

Two major types of fully distributed cost analysis

Two types of punched cards used to program the machine.

Two F-14 Tomcats of the Islamic Republic of Iran Air Force | IRIAF, armed with different types of air-to-air missiles, including AIM-54 Phoenixes.

Two types of bone can be identified microscopically according to the pattern of collagen forming the osteoid ( collagenous support tissue of type I collagen embedded in glycosaminoglycan gel ):

* Brake equipment: Two main types are used: brake shoes that are pressed against the tread of the wheel, and disc brakes and pads.

Two types of crystallographic defects.

Two liquids can form different types of emulsions.

Two main types of filter media are employed in the chemical laboratory — surface filter, a solid sieve which traps the solid particles, with or without the aid of filter paper ( e. g. Büchner funnel, Belt filter, Rotary vacuum-drum filter, Cross-flow filters, Screen filter ), and a depth filter, a bed of granular material which retains the solid particles as it passes ( e. g. sand filter ).

Two major types of hydrological models can be distinguished:

Two ’ s complement arithmetic is convenient because there is a perfect one-to-one correspondence between representations and values ( in particular, no separate + 0 and − 0 ), and because addition, subtraction and multiplication do not need to distinguish between signed and unsigned types.

Two types of ink were prevalent at the time: the Greek and Roman writing ink ( soot, glue, and water ) and the 12th century variety composed of ferrous sulfate, gall, gum, and water.

Two types of climate are found in Jamaica.

Two courses of red yarn illustrating two basic fabric types.

Two dwarf species, named Orcinus nanus and Orcinus glacialis, were described during the 1980s by Soviet researchers, but most cetacean researchers are skeptical about their status, and linking these directly to the types described below is difficult.

Two types of coprocessors were defined, the floating point unit ( MC68881 or MC68882 FPU ) and the paged memory management unit ( MC68851 PMMU ).

Two other types of acquired resistance rarely seen include the production of drug-inactivating enzymes ( esterases or kinases ), as well as the production of active ATP-dependent efflux proteins that transport the drug outside of the cell.

Two different types of cost are important in microeconomics: marginal cost, and fixed cost.

Two types of inland river barges were generally available in Europe for use in Sea Lion: the peniche, which was 38. 5 metres long and carried 360 tons of cargo, and the Kampine, which was 50 metres long and carried 620 tons of cargo.

Two French voice types, premiere dugazon and deuxieme dugazon, were named after successive stages in the career of Louise-Rosalie Lefebvre ( Mme.

Two types of ring are used: the upper rings have solid faces and provide gas sealing ; lower rings have narrow edges and a U-shaped profile, to act as oil scrapers.

Two types of deviations from linearity may be considered here.

" Two important types of future interests are: