1. I never doubted you; I was sure you would bring me the money. 我从不怀疑你的，我肯定你会给我带来这笔钱的。
2. But when in doubt, you can always ask. 但是一旦有疑惑，你总是可以问的。
3. He insinuated his doubt of her ability. 他暗示了他对她能力的怀疑。
1. the state of being unsure of something
2. uncertainty about the truth or factuality of existence of something v.
1. consider unlikely or have doubts about
2. lack confidence in or have doubts about