A Abdomen 腹部Abdominal cavity 腹腔 Abdominal muscle 腹肌Abiotic (1)非生物的(2) 无生命的 Abscess 脓肿Absolute alcohol 无水酒精Absorption 吸收作用Accommodation 调整作用 Acetic acid 醋酸Acetic alcohol 醋酸酒精 Aceto-orcein 醋酸地衣红Acetylcholine 乙醯胆碱 Acid rain 酸雨Acquired immune deficiency syndrome (AIDS) 后天免疫力缺乏症(艾滋病) Acquired immunity 获得免疫后天免疫 Acromegaly 肢端巨大症Acrosome 顶体Actinomycete 放 菌Activated sludge method 活性污(淤)泥处理法 Active immunity 自动免疫Active site 活性部位Active transport 主动运输 Adaptation 适