講解：
succumb (to sth)
屈服；屈從；抵擋不住(攻擊、疾病、誘惑等):
His career was cut short when he succumbed to cancer.
他的事業隨著他死于癌癥而中斷。

be in office
任職
How long has he been in office ?
他任職多久了？

backfire (on sb)
產生事與愿違的不良(或危險)后果:
Unfortunately the plan backfired.
不幸的是,計劃產生了適得其反的結果。

to the best of your ability
盡己所能
You promised to finish the job to the best of your ability.
你說出你會盡力完成這份工作的。

he worst-case scenario
最壞的設想
The worst-case scenario would be for the factory to be closed down.
最壞的情況可能是工廠關閉。

come to power
統治
The party came to power at the last election.
這個政黨是在上次大選中當選執政的。

in effect
實際上；事實上:
In effect, the two systems are identical.
實際上,這兩種系統完全一樣。