重点讲解：
1. be into sth.
对…很感兴趣；极喜欢；
eg. I'm into electronics myself.
我本身对电子很感兴趣。
eg. Don't be into computer games, it's bad for you.
别迷上电脑游戏，对你是有害的。
2. now that
既然；由于；
eg. They are hoping for a return to normality now that the war is over.
既然战争结束了，他们希望一切都恢复常态。
eg. Now that you are grown up, you should not rely on your parents.
既然你长大了，就不应该依靠你的父母。
3. build up
建立；增强；
eg. The facts added together to build up a theory which was indisputable.
这些事实汇集在一起足以构成一条不容置疑的理论。
eg. It is easier to pull down than to build up.
拆房容易盖房难。
