166．Pollution poses a great threat to our existence.

　　污染对我们的生存造成巨大威胁。

　　167．We should do our best to achieve our goal in life.

　　我们应尽全力去达成我们的人生目标。

　　168．Weather a large family is a good thing or not is a very popular topic, which is often talked about not only by city residents but by farmers as well.

　　家庭人口多好还是家庭人口少好是一个非常通俗的主题，不仅是城里人，而且农民都经常讨论这个问题。

　　169．As is known to all, fake and inferior commodities harm the interests of consumers.

　　众所周知，假冒伪劣商品损害了消费者的利益。

　　170．Today an increasing number of people have realized that law education is of great importance. In order to keep law and order, every one of us is supposed to get a law education.

　　现在，愈来愈多的人认识到法制教育的重要性。为了维护社会治安 ，我们每人都应该接受法制教育。