challenge
US /ˈtʃæl.ɪndʒ/
UK /ˈtʃæl.ɪndʒ/

名词
1.
挑战, 挑衅
a call to someone to participate in a competitive situation or fight to decide who is superior in terms of ability or strength
示例:
•
He accepted the challenge to a duel.
他接受了决斗的挑战。
•
The team issued a challenge to their rivals.
该队向他们的对手发出了挑战。
2.
挑战, 难题, 困难
a difficult task or problem; something that tests one's ability or resources
示例:
•
Learning a new language is a real challenge.
学习一门新语言是一个真正的挑战。
•
The project presented many technical challenges.
该项目提出了许多技术挑战。
动词
1.
在 Lingoland 学习这个单词