242.One way over-worked，under-resourced parents show commitment to their children is to leap to their defense.

英語四級譯文:
勞累過度、資源不足的父母對孩子盡義務的一種方式就是沖上前保護他們。

四級詞匯講解:
本句的主干是one way is to leap to defense。over-worked, under-resourced parents show commitment to their children為way的定語從句，其中兩個由動詞過去分詞構成的合成詞均為prints的定語。

show commitment to的意思是“對……兌現承諾，向……體現忠誠”。如:
All couples should show commitrnent to marriage.所有夫妻都應該對婚姻表示忠誠。

leap to的意思是“立刻(做某事)”。如:
He leaped to the telephone as soon as he came into the room.他一進入房間就沖過去抓起了電話。

英語四級考點歸納:
動詞leap的常見短語如下:

※ leap sth. over sth.意為“使……跳過(障礙)”。如:
He leaped the horse over a fence.他策馬越過了籬笆。

※ leap to a conclusion意為“(未經全面考慮)匆匆作出結論”，也可用作jump to a conclusion。如:
You should be objective; don't leap/jump to a conclusion.你應該要客觀，不要忙著下結論。

※ leap at sth.意為“迫不及待地接受某事物”。如:
She leaped at the invitation to the party.她立刻接受了參加聚會的邀請。