Backcrossing
v. 回[逆]交, 回交杂种( backcross的现在分词 )
✅ 同义词
🗣️ 情景例句
and she belongs to Mr. and Mrs. Levinson.
它是Levinson夫妇家的狗。
He's probably here.
他可能在这儿。
The number 13 bus will take you to the hospital.
13路车会带你去医院。