重点讲解：
1. happen to do sth. 碰巧；凑巧；
She happened to be out when we called.
我们打电话时她刚巧不在家XH[@h*PRe;Il,K#kS7A。
2. look for 找；寻；
We all need to look for ways to reduce our carbon footprint.
我们都需要寻求降低碳排放量的方法NwS9h1LUw9La。
3. be away from 离（某人或某地）有一定距离；
The company is so far away from my dorm that I had to spend much time on the way.
公司离我的宿舍太远，我不得不花很多时间在路上B+*pIEEF4ZENIYmO。
4. break up （使）分裂；（被）拆分；(使）破碎；
There was a danger of the ship breaking up completely.
这艘船有彻底解体的危险BhMaq%a]FH17。