a trickle of rain的用法和样例：
- Only a trickle of water came from the faucet.
- A trickle of blood ran down his neck.
- Only a trickle of water came out of the pipe.
- There was a trickle of blood from the wound.
- A trickle of water could be seen from the ceiling.
- He removed a trickle of sweat from the corner of his neat temple.