食品包装充气是什么:by which怎么翻译? 谢谢~~

by which怎么翻译? 谢谢~~ )Many jobs which have been done only by men can be equally well done by women这句话怎么翻译 定于从句中by which，for which,at which，分别怎么用，什么意思 翻译一下which is also concerned by this preoccupation a note signed by the china head,怎么翻译，谢谢！ by many people怎么翻译 case-by-case怎么翻译？ By the returns怎么翻译？ vote-by-vote怎么翻译？ which targets the mass market，怎么翻译？