Backcrossing
v. 回[逆]交, 回交杂种( backcross的现在分词 )
✅ 同义词
🗣️ 情景例句
I wish Robbie and Alexandra had come to this meeting.
我真希望Robbie和Alexandra已经来参加开会。
As well be hanged for a sheep as for a lamb.
偷大偷小都是贼。
Where are the balls?
球在哪里？