Precursory
a. 先驅的, 前兆的
? 同義詞
??? 情景例句
When do we see the reviews?
什么時候我們可以看到評論
The tour will take about an hour and a half. We ought to be back here by 3:00.
參觀大概要一個半小時，3點鐘以前回到這里。
I agree with you. We've got to do something about pollution. It's getting worse.
我同意你的看法。我們得對污染采取措施了。污染越來越嚴重了。