Backcross
vt.vi. 使回交, (使)逆代杂交
✅ 同义词
🗣️ 情景例句
After my wife died,
我妻子去世后，
Over there.
在那边。
Happy birthday! said the twins, and gave her a big red box.
“生日快乐！”双胞姐妹说，并将一个大红盒子送给了她。