alluvium—沖積物；沖積層 alpine—高山 alpine meadow soil—高山草甸土 Alpine mountain-building movement—阿爾卑斯造山運動 alpine vegetation—高山植物 Alpine-Himalayan Belt—阿爾卑斯－－喜馬拉雅山帶 altiplano—高原（玻利維亞） altitude—高度 ammonia—氨 annual mean temperature—年平均溫 annual rainfall—年雨量 annual range of temperature—年溫差 annual runoff—年徑流；年徑流量 Antarctic Circle—南極圈 anthropogenic factor—人為因素 anticline—背斜 anticyclone—反氣旋 anticyclonic circulation—反氣旋式環流 aquaculture—水產養殖 aquatic plant—水生植物 aqueduct—引水槽 aquifer—畜水層 arable farming—耕作農業 arable land—〔可〕耕地 arch—(1)背斜，(2)拱頂，(3)穹窿 archipelago—群島 Arctic air mass—北極氣團 Arctic Circle—北極圈 Arctic climate—北極氣候 arctic front—北極鋒 area sampling—區域抽樣；地區抽樣 areal association—地區聯繫；地域聯繫 areal differentiation—地域分異 areal distribution—地區分佈；地域分佈 areal specialization—地區專門化；地域專門化 areal variation—地區差異；地域差異 arid—乾旱 arid {dry} climate—乾旱氣候 arid land—旱地 aridisol—旱成土 aridity—乾燥〔度〕；乾旱〔度〕 artesian basin—自流水盆地 artesian water—自流水 artesian well—自流井 artificial climate—人造氣候 assembly indu stry —裝配工業 assembly line—裝配線 assimilation—同化〔作用〕 association—聯繫 asthenosphere—軟流圈；岩流圈 atlas—地圖集 atmosphere—大氣；大氣圈 atmospheric absorption—大氣吸收 atmospheric circu lation—大氣環流 atmospheric distu rbance—大氣擾動 atmospheric heat balance—大氣熱平衡 atmospheric heat sou rce—大氣熱源 atmospheric motion—大氣流動 atmospheric pollu tant—大氣污染物 atmospheric pollu tion—大氣污染 atmospheric pressu re—大氣壓力；氣壓 atmospheric radiation—大氣輻射 atmospheric refraction—大氣折射 atoll—環礁 attrition—磨耗〔作用〕；自磨〔作用〕 au reole—〔接觸〕變質帶 autumnal equinox—秋分 available relief...
