Gastrea theory
[医] 原肠祖学说
🧩 词语组成解析
n. 原肠动物
🗣️ 情景例句
Don't open the door if you don't know who it is.
如果有陌生人敲门不要开门。
Quality matters more than quantity.
质重于量。
Excuse me. Is there a police-station near here?
请问，附近有警察局吗？