挑战者英文：challenger。
挑战造句：
1、Bill was stimulated by the challenge.
比尔受到该挑战的激励。
2、She beat off a challenge to her leadership.
她战胜了对她的领导地位的挑战。
3、 I hope that he proves equal to the challenge.
我希望他最后能应付这一挑战。
4、You can rely on him to respond to a challenge.
你可以信赖他，他懂得应付挑战。
5、 I called out a challenge, but there was no reply.
我发起了一个挑战，但是没人回应。
6、He said he's game for a similar challenge next year.
他说明年他敢尝试一次类似的挑战。
7、The new government's first challenge is the economy.
新政府面临的第一项挑战是经济。
天天考古
