Mesectoblast
中外胚层, 外中胚层
🗣️ 情景例句
Do I have to remind you yet again?
还需要我再次提醒你吗？
He is a fool who cannot be angry,but he is a wise man who will not.
不会发怒是蠢人，不愿发怒是聪明人。
Which hammer? This one?
哪一把？是这把吗？