一，单词学习
comb, 英[kəʊm]
n.梳子; 梳棉机; 鸡冠状的东西; 蜂窝状的东西; |
vt.梳理; 彻底搜查;
vi.涌起，卷起;
Homicide detectives and specialist forensic police continue to comb the home for evidence.
重案组探员和专业的司法鉴定警察继续自习搜查这间屋子，希望能发现证据。cleave, 英[kli:v]
v. 劈开; 紧贴; 迅速穿过; 信守;
The choice is simple: do we look inward or outward, look to the future or cleave to the past.
这个选择是很明了的：我们是着眼外在还是反求诸内心，望向未来还是囿于过去。turnover
n. 人员更替率
In a White House where turnover is high and leaks are already pervasive, Trump is reportedly left unsure of who to trust.
白宫目前人员更替频繁，泄密事件无处不在，据说川普已经不知道该信任谁了。footloose and fancy-free
自由自在，无拘无束的
Their geographical behavior is limited and predictable, not footloose and fancy-free.
它们的地理行为是有限和可预测的，而不是自由自在，无拘无束的。
二，常用表达
- hang on to
紧紧握住；保留
1.He hung on to the back of her coat.
2.He is determined to hang on to his job.
三，学习tips
- 有声书练习听力
经典文学名著和经济学人的word-for-word等
