②To keep fit, first of all, you'd better keep a balanced (balance) diet.　

　　为了保持健康，首先，你要保持平衡的膳食。

　　③Try to keep a balance between work and relaxation.

　　尽量保持工作与休闲的平衡。

　　[语境串记]　When he first learned to skate, he didn't know how to balance himself.But now he has learned to keep himself balanced while skating.

　　最初学习滑冰时，他不知道如何使自己保持平衡。可是，现在他已经学会了滑冰时使自己保持平衡。

　　3．(教材P10)Want to lose weight?

　　想变瘦吗？

　　lose weight减轻体重；变瘦；减肥

　　gain/put on weight　　　　体重增加；长胖；增肥

　　by weight 按体重/重量

　　watch one's weight 控制体重

　　①Because there is not enough food, they are losing weight.

　　因为没有足够的食物吃，他们的体重在减轻。

　　②Some people do put on weight after they quit smoking.

　　一些人戒烟后体重确实会增加。

　　③Don't give me anything to eat; I have to watch_my_weight.

　　别给我吃任何东西，我得控制体重。

　　[语境串记]　Jack put on/gained weight last year, but he managed to lose weight by exercise quickly.Now he is still watching his weight all the time.

　　杰克去年长胖了，但他靠运动很快变瘦了。现在，他仍然一直在控制体重。

　　4．(教材P10)Curiosity drove Wang Peng inside.

　　王鹏在好奇心的驱使下走了进去。

　　curiosity n．好奇心；好奇

　　 (1)in/with curiosity　　　　　好奇地

　　out of curiosity 出于好奇

　　(2)curious adj. 好奇的

　　be curious to do sth. 好奇地做某事

be curious about sth. 对......感到奇怪