21.act on 奉行，按照行动;act as 扮演;act for代理
22.adapt oneself to 使自己适应于
23.adapt 改编，改写
24.in addition 此外，又，加之
25.in addition to 除外
26.adhere to 粘附;坚持，遵循
27.adjacent 毗邻的，临近的
28.adjust 调节;适应
29.admit of 的可能，留有的余地
30.in advance 预告，事先
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