Backcrawl
= backstroke
🗣️ 情景例句
Just a moment, I'll ask him.
稍等，我问一下他。
We are supposed to help each other.
我们理应彼此帮助。
This morning, however, a firemen accidentally discovered the cause.
然而今天上午，一个消防队员偶然发现了起火的原因。