Backcross
vt.vi. 使回交, (使)逆代杂交
✅ 同义词
🗣️ 情景例句
We talked about that earlier.
我们先前谈过这个问题。
Friends are thieves of time.
交朋友，费时间。
It was impossible for the Ombudsman to take action,
司法特派员难以处理。