18. lower the risk of doing something 降低…………风险

    decrease the risk of doing something 减少…………….的风险

Scientific studies say that tea not only lowers the risk of getting cancer, but it also decreases the risk of dying from heart disease.

19. back sb/sth up 支持某人/某物

I told you I wasn't on the spot then, Stone can back me up.

我告诉你我当时不在现场了，石头可以给我作证。

backup

vt.

做备份

adj.

候补的, 支持性的

a backup pilot.

候补飞行员

Do remember to backup your computer files in case of something bad may happen!

20. 11个最常用的否定前缀

1） non-

non-tea drinkers

non-stop train

non-smoking area

2)        ab-

abnormal

abuse

3)        anti-

antiwar

anti-tank (A.T.)  

防坦克的, 反坦克的

4)        de-

decode 解码

defrost 解冻

5）il-

illegal

illogical

6)      im-

impossible

immature

7)      in-

incorrect

inexpensive

8)      ir-

irregular

irresponsible

9)      dis-

disagree

dishonest

10)   mis-

misfortune

mislead

11)   un-

unfair

unmarried

21. paparazzo 狗仔队

n. 专门追逐名人的摄影记者

The paparazzi are photographers who follow famous people around, hoping to take interesting or shocking photographs of them that they can sell to a newspaper.

The term originally came from the name of an Italian movie character, Signor Paparazzo. He was a photographer who chased stars, and his last name meant “a buzzing insect.”

The paparazzo may not be well-liked.

狗仔队也许并不那么讨人喜欢。