n. a demanding or stimulating situation
n. a call to engage in a contest or fight
n. questioning a statement and demanding an explanation
n. a formal objection to the selection of a particular person as a juror
n. 挑战, 盘问
vt. 向...挑战, 要求, 怀疑
vi. 挑战, 对(证据等)表示异议
1. She loves to take on new challenges at work.
她喜欢在工作中接受新的挑战。
2. Climbing a mountain is a big challenge for many people.
爬山对很多人来说是一个很大的挑战。
3. The math test was more difficult than I expected, but I enjoyed the challenge.
这个数学测试比我预期的要难，但我享受这个挑战。