Ectosac
[医] 外膜, 外囊(卵)
🗣️ 情景例句
without studying these building plans more carefully.
在没有仔细研究这些建筑图的情况下。
Make up your mind!
干脆点！
The airport was built years ago, but for some reason it could not be used then.
机场是许多年前建的，但由于某种原因当时未能启用。