Ectosac
[医] 外膜, 外囊(卵)
🗣️ 情景例句
Do you ever think about your clildhood?
你回忆过童年吗？
Never too old (or late) to learn.
学到老，学不了。
probably vertical, cliffs, and gentle sediment-covered terraces,
乃至垂直的峭壁和沉积物覆盖的缓和的阶梯地带，