王晨雨 第2次作业 1248602

1.Chronic: (especially of a disease) lasting for a long time; difficult to cure or get rid of 长期的，慢性的，难以治愈的（尤指疾病）
Ex: this country has chronic unemployment problem.
Elderly people are easy to get chronic disease.
2. eradicate: to destroy or get rid of sth completely, especially sth bad 根除，消灭，杜绝
Ex: we are determined to eradicate racism from our sport.
I’m trying to eradicate the mice in this apartment.
3. Gullible: too willing to believe or accept what other people tell you and therefore easily tricked. 轻信的，易受骗的， 易上当的
Ex: What point is there in admitting that the stories fed to the gullible public were false?
I’m so gullible I would have believed him.
4. Courtesy: polite behavior that shows respect for other people. 礼貌谦恭
Ex: He helped her off the bus out of courtesy.
At least if they're arguing, they're doing you the courtesy of being interested.
5. Cluster: a group of things or people that are close together. N.一串，一簇 v. 群集，丛生
Ex: I want to pick that cluster of delicious grapes and eat them all!
The passengers clustered together in small groups.