Perisarc
n. [動](某些水螅體的)圍鞘
??? 情景例句
He'll be back soon.
他很快就回來。
He applied for a scholarship at Harvard University.
他申請了哈佛的獎學金。
He informed the station at once, but no one there was able to explain the mystery.
他馬上把情況報告了該基地，但那里的人沒有一個能解釋這到底是怎么回事。