a clenched-fist salute的用法和样例：
- You cannot shake hands with a clenched fist.
- You cannot shake hands with a clenched fist though.
- My stomach seized up like a clenched fist, and nausea rolled into me like a fever.
- Your stomach still looks flat now, but in your uterus has been significant change, pre-pregnancy your uterus is like a clenched fist, and now it has not only increased and become very soft.
- "You can't shake hands with a clenched fist."