Backcross
vt.vi. 使回交, (使)逆代杂交
✅ 同义词
🗣️ 情景例句
Well, in 1919.
是的，在1919年。
Do you often work out?
你经常锻炼身体吗？
Were there any exciting incidents during your journey?
你们在旅行中有没有什么令人激动的事情？