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、attention

注意；留心；专注

You have my undivided attention.

我专心听你所讲。

Later he turned his attention to the desperate state of housing in the province.

其后，他将注意力转向了该省形势严峻的住房问题。

（尤指大众的）注意力，关注

Volume Two, subtitled 'The Lawyers', will also attract considerable attention.

副标题为“律师”的第二册也将获得广泛关注。

The conference may help to focus attention on the economy.

此次会议可能有助于将关注焦点放在经济上。

保养;照料;照顾

Each year more than two million household injuries need medical attention.

每年有超过200万起家中受伤事件需要医疗处理。

a demanding baby who seems to want attention 24 hours a day.

好像一天24小时都要人照看的难缠的宝宝