Build on sth (phrasal verb)

　　●to use a success or achievement as a base from which to achieve more success.

　　（建基於…，在…基礎上再取得進展）

　　Examples:　　

　　1.We must build on our reputation to expand the business.　　

　　2.A good relationship is built on trust.

　　Be bound (up) with sth (idiom)

　　●To be linked or connected to something else.

　　 （與…關係密切，與…縛定在一起）

　　Examples:　　

　　1.Unfortunately, when you have roommates, your mood is bound up with theirs—a miserable roommate can make you miserable too.　　

　　2.The survival of whales is intimately bound up with the health of the ocean.

　　Bulwark (noun)

　　●Something that protects you from dangerous or unpleasant situations.（防禦物，屏障）

　　Examples:　　

　　1.My savings were to be a bulwark against unemployment.　　

　　2.The new dam was a bulwark against future floods.

　　First of all (idiom)

　　●Most importantly.（首要，最重要）

　　Examples:　　

　　1.My main goal in life, first of all, is to live every day to the fullest, no matter how long that is.　　

　　2.The importance of history is first of all it tells you the way the world was.

　　Intrinsic (adj.)

　　●Being part of the nature or character of someone or something.（固有的，內在的）

　　Examples:　　

　　1.Parents need to teach children the intrinsic value of good behavior.　　

　　2.But what is it that makes sport such an essential and intrinsic part of the lives of some people?