1) Many nations have been faced with the problem of ...

许多国家已经面临的问题..

2) Recently the problem has been brought into focus.

最近的问题已成为关注的焦点。

3) Recently the phenomenon has become a heated topic.

最近，这种现象已经成为一个热门话题。

4) Recently the issue has aroused great concern among ...

最近这个问题已经引起极大关注......

5) Nowadays there is a growing concern over ...

如今，有越来越多的关注......

6) Never in our history has the idea that ... been so popular.

在我国历史上从未有想法，...一直如此受欢迎。

7) Faced with ..., quite a few people argue that ...

面对...，相当多的人认为...

8) According to a recent survey, ...

据最近的一项调查显示，...