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| Terms for subject Environment (7358 entries) |
| arid land (Lands characterized by low annual rainfall of less than 250 mm, by evaporation exceeding precipitation and a sparse vegetation) | 干旱地区 | |
| arid land ecosystem (The interacting system of a biological community and its non-living environmental surroundings in a climatic region where the annual precipitation averages less than 10 inches per year) | 干旱区生态系统 | |
| armament (The weapons, ammunition and equipment, or the total force held by a military unit or state) | 武装 | |
| armament conversion (Change in character, form or function of the arms and equipment with which a military unit is supplied) | 军事改造 | |
| armed | 有准备的 | |
| armed | 有刺、齿等护身器官的 | |
| armed forces (The military units of a state, typically divided by their differing contexts of operations, such as the army, navy, air force and marines) | 武装力量 | |
| aromatic compound (Compounds characterized by the presence of at least one benzene ring) | 芳香族化合物 | |
| aromatic compound | 芳香族化合物 | |
| aromatic hydrocarbon (Hydrocarbons having an unsaturated ring containing alternating double and single bonds, especially containing a benzene ring) | 芳香族碳氢化合物 | |
| aromatic substance (Substance having a distinctive, usually fragrant smell) | 芳香物 | |
| arrangement for a deposit on packaging (Agreement to provide refunds or payments in exchange for used bottles or packaging materials) | 包装定金的安排 | |
| Arrhenius diagram | 阿雷纽斯图解 | |
| Arrhenius theory | 阿雷纽斯理论 | |
| arsenic (A toxic metalloid element, existing in several allotropic forms, that occurs principally in realgar and orpiment and as the free element. It is used in transistors, lead-based alloys, and high temperature brasses) | 砷 | |
| art (The creation of works of beauty or other special significance) | 艺术 | |
| arthropod (The largest phylum in the animal kingdom; adults typically have segmented body, a sclerotized integument, and many-jointed segmental limbs) | 节肢动物 | |
| Articulata (Animals characterized by the repetition of similar segments (metameres), exhibited especially by arthropods, annelids, and vertebrates in early embryonic stages and in certain specialized adult structures) | 有关节类；关节海百合类亚纲 | |
| artificial lake (Lakes created behind manmade barriers) | 人工湖 | |
| artificial reproductive technique | 人工再生技术 |