Enteroderm
消化道内胚层
🗣️ 情景例句
And I'll bet
我敢打赌
Rats leave (or desert or forsake) a sinking ship.
船沈鼠先窜。
Some of my acquaintances in the country come up to town once or twice a year to visit the theatre as a special treat.
我在乡村有一些熟人，他们每年进城来看一回或几回戏，并把此看作一种特殊的享受。