a sure aim的用法和样例：
- It is no fun betting on a sure thing.
- She drew the outline with a sure hand.
- Exercise is a sure way of losing weight.
- These stocks will earn money; it's a sure thing.
- Not bothering to vote is a sure sign of defeatism.
- Not bother to vote is a sure sign of defeatism.
a sure aim的相关资料：