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、construction

(房屋、工廠、道路、橋梁等的)建筑，建造

He'd already started construction on a hunting lodge.

他已經開始建造一間狩獵用的小屋。

the only nuclear power station under construction in Britain.

英國唯一一家在建的核電站

(車輛、機器等的)制造，建造

companies who have long experience in the construction of those types of equipment.

長期從事此類設備制造的公司

With the exception of teak, this is the finest wood for boat construction.

這是除柚木以外最好的造船木材。