121. be certain of (=be sure of) 有把握, 一定

a) We are certain of victory. 我們一定會獲得勝利。

122. for certain (=for sure )肯定地,有把握地

a) Some soils are actually too alkaline for certain plant life.

123. by chance(=accidentally, by accident)偶然

a) They met by chance on a plane.

b) 他們在飛機(jī)上不期而遇

124. for a change換換環(huán)境(花樣等)

a) ate early for a change. 變化一下提早吃飯

125. in charge of (=responsible for) 負(fù)責(zé)(某事)

a) Who's in Charge of this Network?

126. take charge of (be responsible for)負(fù)責(zé)管理(照顧)

a) She is the youngest manager who takes charge of the overseas business in the company.她是這個公司里負(fù)責(zé)海外業(yè)務(wù)最年輕的經(jīng)理。

127. charge…for 因…索取(費(fèi)用),charge sb with sth 控告某人犯有…

a) Charges ten dollars for a haircut.

128. round the clock(=all day and all night, usually without stopping) 晝夜不停地

a) This is a terrific mission and we are very busy doing science round the clock.

129. comment on sth評論

a) Everyone commented on her new hat.

b) 大家都在評論她的新帽子。

c) He commented on the bad road.

d) 他評論這條糟糕的路。

130. commit oneself to致力于

a) I commit myself to strive for grades of "C" or better in all my high school classes and to benefit fully from the classes offered during the summer program.