Germ layer theory
[医] 胚层学说
🧩 词语组成解析
layer
['leiə]
n. 层，层次;膜;[植]压条;放置者，计划者;
vt. 把…分层堆放;借助压条法;生根繁殖;将（头发）剪成不同层次;
vi. 形成或分成层次;[植]通过压条法而生根;
🗣️ 情景例句
I want our children to learn
我要孩子们学习到
You can't get it any cheaper than this.
这再便宜你就买不到了。
A man was lying in the box on top of a pile of woolen goods.
箱内有一个人正躺在一堆毛织品之上。