Ocrea
[植]托葉鞘
??? 情景例句
Chances are ten to one that we'll have a economic recession.
我們十有八九會陷入經濟衰退。
This offer is firm subject to your acceptance reaching us not later than December 15.
此報盤為實盤，但以我方在12月15日前收到你方答復為準。
and found our then prevailing primitive state completely uninteresting to their own advanced knowledge.
并且發現我們地球當時普遍存在著的原始狀態同他們先進的知識相比是索然無味的。