n. the state of being unsure of something
n. uncertainty about the truth or factuality or existence of something
v. consider unlikely or have doubts about
v. lack confidence in or have doubts about
n. 怀疑, 疑惑
v. 怀疑, 不信
1. I have some doubt about his honesty.
我对他的诚实性有些怀疑。
2. Don’t doubt yourself; you can do it!
不要怀疑自己；你能做到的！
3. There was no doubt that she would win the competition.
毫无疑问，她会赢得比赛。