v. fail to do something; leave something undone
v. be unsuccessful
v. disappoint, prove undependable to; abandon, forsake
v. stop operating or functioning
vi. 失败, 缺乏, 中断, 衰退, 失灵
vt. 忘记, 使...失望, 缺乏, 不及格
n. 不及格
1. I failed the test because I didn't study enough.
我考试失败了，因为我没有好好复习。
2. Don't be afraid to fail; it's a part of learning.
不要害怕失败；这是学习的一部分。
3. She tried her best, but she still failed to win the competition.
她尽了全力，但仍然没有赢得比赛。