1、challenge

挑戰;難題

I like a big challenge and they don't come much bigger than this.

我喜歡大的挑戰，而所有挑戰中再沒有比這更大的了。

The new government's first challenge is the economy.

新政府面臨的第一個難題是經濟問題。

(成功地)應對挑戰，迎接挑戰

The new Germany must rise to the challenge of its enhanced responsibilities.

一個嶄新的德國必須迎接挑戰，承擔更多的責任。

They rose to the challenge of entertaining 80 schoolchildren for an afternoon.

他們一個下午成功接待了80名學童。

懷疑，質疑(真實性、價值、權威等)

Democratic leaders have challenged the president to sign the bill.

民主黨領袖對總統簽署這項法案提出了質疑。

The move was immediately challenged by two of the republics.

此項動議立即遭到其中兩個共和國的反對。

2、exhaust

使精疲力竭;使疲憊不堪

Don't exhaust him.

不要把他累壞了。

He took to walking long distances in an attempt to physically exhaust himself.

他開始長距離步行，試圖耗盡自己的體力。

耗盡;用光

We have exhausted all our material resources.

我們已經耗盡了所有的物資。

They said that food supplies were almost exhausted.

他們說供應的食物幾乎快要吃完了。