they have contracted to build the new tunnel by 1997.他们已经定了和他在97年前建成那条新隧道

来源：百度知道编辑：UC知道时间：2024/05/30 04:36:15

哪有97年“前”这意思啊？？

so, the question is?

他用BY了啊，BY就表示97年前了啊

就像，I have to finish my homework by saturday. 就是我必须在星期六之前做完作业。

BY：(表示时间)不迟于; 在…时候
Be here by four o'clock.
四点钟之前到这儿。

by = 前

They have gone forever. they have lived in beijing They have finished their ____ 翻译。 What have they done? [ ] have they done [ ] the spy ? They must have arrived by now,haven't they? do they have plates?是什么意思啊? they have lived here for long..... they have got a headache对吗？ do they always have lunch at noon