Ectoderm
n. 外胚层, 外层\\n[医] 外胚层
🗣️ 情景例句
I would like to buy a diamond necklace for my wife.
我想为我的妻子买一条钻石项链。
There'll be time for questions at the end.
最后会有时间发问的。
No problem! Tell me, do I have to take them before or after meals?
“那不难！告诉我，我是在饭前还是饭后吃呢？”