重点讲解：
1. major in 主修，专攻；
例句：Mr.Lee said he would major in history and he means business.
李先生说他要专攻历史，他是决心认真干的3Zee~DQK21Kp。
2. by comparison 与…相比；与…比较而言；
例句：The criminal is unpardonably wicked, by comparison, all other criminals are virtuous.
这个罪犯真是十恶不赦，相比之下，其他罪犯还算有点良心]O@J=wWXrM&Sd。
3. cool down （使）变凉；（使）冷却；（使）降温；
例句：Harrod wanted to hold up somewhere till things cooled down.
哈罗德想躲一躲，等事情平息IF3U8dxZFEx。
4. be related to 涉及；关于；
例句：These two events were related to each other.
这两个事件相互有联系9wFug396IIuXKI9。
5. fall behind 落后；跟不上；
例句：I've fallen behind in my work since last week.
从上周起，我在工作上已经落后了fJk&z^]a9X,4p--w&。
6. compared with 与…相比；和…比起来；
例句：Our price is reasonable as compared with that in the international market.
我们的价格和国际市场的价格相比还是合理的wXaP6E_k=UlHcBjYo0L。