Mesectoderm
中外胚层
🗣️ 情景例句
Which subject were you best interested in?
你对哪一科最有兴趣？
This is a TV set.
这是一台电视机。
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。