重點講解：
1. go overboard
做得過分（或過火）；
eg. Women sometimes damage their skin by going overboard with abrasive cleansers.
女性有時因過度使用磨砂膏而損傷了皮膚[Ayc5.[r1@jCwi+nK=mx。
eg. He has a tendency to go overboard at their parties.
在他們的晚會上，他總是喜歡過分地表現自己VJB11N-*D+X+s[,s!qtJ。
2. fed up
厭倦的；厭煩的；膩味的；
eg. He had become fed up with city life.
他已經厭倦了城市生活^|@ZksUH~Sip0jqW。
eg. I'm just fed up and I don't know what to do.
我就是膩味了，不知道該怎么辦df8]0z!9@Iy。
3. back and forth
往返；
eg. He paced back and forth.
他來回踱步9,;6!Wqax*[。
eg. Two boys were in the street, tossing a baseball back and forth.
兩個男孩在街上來來回回地投接棒球7gfpG_DU9K。
4. tune out
走神；開小差；漠視；
eg. Whatever you're talking about, children rapidly tune out if you go beyond them.
不管你在說什么，如果孩子們聽不懂，就會很快走神i1tq@_Y+1X[7FNwP。
eg. Rose heard the familiar voice, but tuned out the words.
羅斯聽到了熟悉的聲音，但沒注意聽說的是什么jG8qWnPjf9。