五. 名理句型

　　1) It is usually the case that ***

　　2) It is plain common sense——the more/less***the more/less***

　　3) The serious reality had taught us a lesson: not being environment friendly will be avenged mercilessly.

　　4) As a proverb says/as is known to all/as a popular saying goes, ***

　　5) I can think of no better illustration than an English poem/adage which goes like this:***

　　6) The old story of***can serve as a good illustration that***