challenge可数吗

challenge：n.挑战、艰巨任务、挑战书、(比赛等的)邀请、提议、质询、质疑、提出异议；v.对…怀疑(或质疑)、拒绝接受、向(某人)挑战、(尤指在对方不情愿时)强烈建议(某人做某事)、考查…的能力、考验…的技巧。challenge作挑战时是可数的，复数是：challenges.Challenges and opportunities挑战和机遇。

Challenge用法

n.挑战；盘问；质疑；怀疑

vt.质疑；向…挑战；

vi.提出挑战，要求竞赛（或竞争）；驳斥；

用作名词(n.)

Exploring outer space is a challenge to mankind.

探索外太空是一项向人类发出的挑战。

A sentry gave the challenge,“Halt!Who goes there?”哨兵喝问:“站住!什么人?”

用作及物动词

S+～+n./pron.

I did not think he was right, so I challenged him.

我认为他是不对的,因此向他提出质疑。

I challenged him to a game of chess.

我要求同他下盘棋。

S+～+wh-clause

He challenged why I didn't get things ready before.

他质问我为什么不早点准备。

用作宾补动词

S+～+n./pron.+to-v

I challenge you to show your proof.

我要求你拿出证据来。

He challenged us to try again.

他向我们挑战,要我们再试试。

1.They rose to the challenge of entertaining 80 school-children for an afternoon.

他们一个下午成功接待了80名学童。

2.Online gaming allows players from around the world to challenge each other.

网络游戏使得全球的玩家可以相互较量。

3.This challenge will occupy Europe for a generation or more.

这将是欧洲在未来二三十年或者更长的时间里所要面临的挑战。

4.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。

5.He said he's game for a similar challenge next year.

他说他明年还愿意接受类似的挑战。

6.Increasingly, more wine-makers are taking up the challenge of growing Pinot Noir.

越来越多的酿酒商开始接受种植黑皮诺葡萄的挑战。