1.kill off 消滅

Their natural predators have been killed off.
它們的天敵被全部殺死。

It is an effective treatment for the bacteria and does kill it off.
這是殺菌的特效藥，能將其全部消滅。

2.prepare for 為…作準備

It is only prudent to prepare for the consequences.
為由此帶來的后果做準備是謹慎之舉。

Now is the time to prepare for the worst.
現在就應該為最壞的狀況做準備。

3.based on 以…為依據

Some think the answer is pay based on annual individual performance.
一些人認為答案在于基于個人年度業績支付薪酬。

International development actors are making judgments based on erroneous statistics.
國際發展研究人士根據錯誤的統計數字作出判斷。

4.spend up 把錢花光

Gabra women in northern kenya spend up to five hours a day carrying heavy jerry cans filled with murky water.
在肯尼亞北部的加布拉婦女花費5個小時，每天背著沉重的杰里與黑暗蓄水罐。

Mr wade can spend up to four hours perfecting his dirt drawings but admitted one heavy downpour could destroy his hard work.
wade先生愿意花上4個小時的時間來完善他的塵垢畫作，卻不得不容忍他的大作會被一場傾盆大雨徹底毀掉。