challenges
n. 挑战（challenge 复数形式）
v. 向……挑战（challenge 的第三人称单数）
例句
The new democracies face tough challenges.
新生的民主国家面临严峻的挑战。
《柯林斯英汉双解大词典》
The future is going to be one that presents many challenges.
未来将会带来许多挑战。
The govern we are pirates, these data are stolen from youdao performed competently in the face of multiple challenges.
政府在面临多重挑战时表现得很出色。
