每当我看到...我就忍不住感到惊讶。Whenever I see ..., I cannot but feel surprised.

　　例：每当我想到我家附近那一条清澈的小溪，我就忍不住感到悲伤。

　　Whenever I think of the clean brook near my home, I cannot but feel sad.

　　=Every time I think of the clean brook near my home, I cannot help feeling sad.

　　据说... It is said (that)子句

　　一般认为... It is thought (that)子句

　　大家都知道... It is known (that)子句

　　据报导... It is reported (that)子句

　　一般预料... It is expected (that)子句

　　一般估计... It is estimated (that)子句

　　一般相信... It is believed (that)子句

　　例：一般相信阅读增加我们的知识、扩大我们的心胸。

　　It is believed (that) reading increases our knowledge and broadens our mind.

　　.. ..的主要理由是...

　　The main reason why ... is (that)子句 例：青少年犯罪的主要理由是社会环境日一败坏。

　　The main reason why the juveniles commit crimes is that social environment is becoming worse.

　　俗语说得好：...。

　　Well goes an old saying,"…"

　　=As an old saying goes(runs, says),"…"

　　=An old saying goes,"…"

　　=It's an old saying (that)子句，例：俗话说得好：「诚实为上策」。

　　As an old saying goes, "Honesty is the best policy."