Backcrossing
v. 回[逆]交, 回交杂种( backcross的现在分词 )
✅ 同义词
🗣️ 情景例句
What are the best exercises for my health?
什么是最利于我身体健康的锻炼方式？
Her socks is under the night stand.
她的短袜在床头柜下面。
It is much cheaper to post or email a long report than to fax it.
邮寄或电子邮递一封长篇报告比传真要便宜得多。