a sense of futility的用法和样例：
- A sense of futility stole over her.
- To be overcome by a sense of futility or defeat.
- The same I hate, I hate the way has been the immutable, I may have a sense of futility of anger.
- Not doing so you turn back into yourself, only to rediscover things you already know. This could generate a sense of futility, which can lead to despair and self-destruction.
- The danger recalled him to a sense of duty.