challenges in lifeFor thousands of years, people have epted challenges in different fields. There are not only physical challenges, but also social and intellectual challenges. Some people risk their lives in playing s...
challenge可数吗面对挑战是可数吗challenge 是可数，复数是：challenges. Challenges and opportunities 挑战和机遇 We are facing these new challenges. 我们正面对这些新的挑战。challenge的现在分词现在分词:challenging challenge 向……挑战动词 过去式:challenged 过去分词:challenged 现在分词:ch...