For years we had little knowledge of what life was like inside China.
以往很多年我們對於中國國內的生活情況所知甚少。
It was a time of peak demand for the product.
那是對該產品需求最旺的時期。
There was much discussion about the reasons for the failure.
就失敗的`原因進行了大量的討論。
The treatment should be repeated every two to three hours.
這種治療方法應該每隔兩到三小時重複一次。
Now she won't have to go out to work any more.
現在她不必再出去工作了。
The need to communicate is a key characteristic of human society.
需要交流是人類社會最重要的一個特徵。