Backcrossing
v. 回[逆]交, 回交杂种( backcross的现在分词 )
✅ 同义词
🗣️ 情景例句
and then we'll figure out what to do today.
然后我们再决定今天做些什么。
An evil chance seldom comes alone.
祸不单行。
It's seven ten.
七点十分了。