Backcross mating
[医] 回交, 逆代杂交
🧩 词语组成解析
vt.vi. 使回交, (使)逆代杂交
n. 交配\\n[化] 配套; 交配
🗣️ 情景例句
How's your health?
你的身体怎么样？
I don't seem to have any luck today.
我今天运气不好。
he said. But I don't have many friends, and I don't enjoy myself very much. I don't know why!
他说，“但是我没有很多朋友，我过得不很愉快。我不懂为什么！”