Gastroderm
n. [植]内胚叶, 内皮层
🗣️ 情景例句
I couldn't help laughing.
我忍不住笑出来。
If you run after two heares, you will catch neither.
两头落空。
The ball struck him so hard that he nearly fell into the water.
球重重地打在他身上，使他差点儿落入水中。