scheme in vain bother one's head for nothing make futile efforts rack one's brains in vain
scheme in vain
bother one's head for nothing
make futile efforts
rack one's brains in vain
白费时间用英文怎么说
白费气力用英文怎么说
白费的用英文怎么说
白费精力用英文怎么说
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英语词典收录了最新的汉英词典和英汉词典，总共有200多万个词条，词库仍在不断更新中。
