不用说…… It goes without saying that … = (It is) needless to say (that) … = It is obvious that … 例：不用说早睡早起是值得的。 It goes without saying that it pays to keep early hours.
在各种……之中，…… Among various kinds of …， … /= Of all the … 例︰在各种运动中我尤其喜欢慢跑。 Among various kinds of sports, I like jogging in particular.
随着人口的增加…… With the increase/growth of the population, … 随着科技的进步…… With the advance of science and technology, … 例：With the rapid development of Taiwan's economy, a lot of social problems have come to pass. 随着台湾经济的快速发展许多社会问题产生了。
……是必要的 It is necessary (for sb.) to do / that … …… 是重要的 It is important/essential (for sb.) to do / that … …… 是适当的 It is proper (for sb.) to do / that … ……是紧急的 It is urgent (for sb.) to do / that … 例：It is proper for us to keep the public places clean. It is proper that we (should) keep the public places clean. 我们应当保持公共场所清洁。