重點講解：
1. lose weight
體重減輕；變瘦；
eg. She has been taking exercises to lose weight from day to day.
她每天鍛煉來減肥JRGvgn%*H!Ua。
eg. Many of us have tried to lose weight and failed miserably.
我們中很多人都努力要減肥，無奈均以慘敗告終(*9vzG.NDCr^%En。
2. cut down on
削減；減少使用；
eg. We must cut down on the amount of material we use.
我們必須削減原料使用量!G0z3EPpoC*7c;L1。
eg. He has to cut down on the consumption of meat.
他不得不減少吃肉Uwkhv*U*fGSU%iBqs[t。
3. stick to
堅持不變；
eg. Lionel, you just tell the cops what you saw; stick to your story.
萊昂內爾，你就把自己看到的告訴警察，實話實說GSb,FhaD#bpDIKU+yv!。
eg. f you stick to doing everything carefully, you catch sight of that you will close to the success.
如果你堅持認真的做每件事，你發現你將向勝利逼近_AoWSZ42Qw*c5.bK。
4. put on weight
體重增加；變胖；
eg. You have put on weight.
你發福了l51xtE=+e)rK。
eg. I was twelve, and starting to put on weight and grow taller.
我那時十二歲，體重開始增加，個子也開始長高了=D8jf~.j!QPP@UO+k。
5. indulge in
（使自己）沉迷；放縱（自己）；
eg. They went into town to indulge in some serious shopping.
他們進城去大肆購物fp^NSpJMEy-66[IdaY+。
eg. But I happily indulge in their own world.
但我仍樂此不疲地沉醉在自己的世界;U~MpIm-CHZ。