音标：['rækt] ；

v. 使痛苦, 使焦虑, 绞尽脑汁( rack的过去式和过去分词 )

imp. & p. p. of Rack

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学英语单词

absolute distribution

absorption-positive(reaction)cytotoxic-negative

benzaldehyde cyanhydrin

can hardly refrain oneself

cappriloquism