介绍:
ad或a后跟同辅音字母的词根前表加强
absorb [əb‘sɔ:b] v.（ab+ sorb吸收）吸收，理解
Jimmy is too absorbed in his computer game to hear.
addition n. 添加，加法
adapt [ə'dæpt] v.
（ad+ apt能力）使适应，改编
Many animals and plants have adapted to life in the desert.
