1、challenge

挑战;难题

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

我喜欢大的挑战，而所有挑战中再没有比这更大的了。

The new government's first challenge is the economy.

新政府面临的第一个难题是经济问题。

(成功地)应对挑战，迎接挑战

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

一个崭新的德国必须迎接挑战，承担更多的责任。

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

他们一个下午成功接待了80名学童。

怀疑，质疑(真实性、价值、权威等)

Democratic leaders have challenged the president to sign the bill.

民主党领袖对总统签署这项法案提出了质疑。

The move was immediately challenged by two of the republics.

此项动议立即遭到其中两个共和国的反对。

2、complete

完全的;十足的

The rebels had taken complete control.

叛乱分子完全控制了局面。

It shows a complete lack of understanding by management.

这表明管理层对此完全不了解。

完整的;全部的;整个的

A complete tenement block was burnt to the ground.

整幢公寓大楼被付之一炬。

The job sheets eventually filled a complete book.

工作指导卡最终装满了整整一个册子。

完成的;结束的

The work of restoring the farmhouse is complete.

修复农舍的工作已经完成。

It'll be two years before the process is complete.

这个过程需要两年才能完成。