Theca
n. 囊, 膜, 鞘\\n[醫(yī)] 膜, 鞘
??? 情景例句
No, you needn't do that.
不行呀，你不必這樣。
Although the cartons are light and easy to handle, we think it is not strong enough to be shipped.
雖然這些紙箱輕便、易拿，但我們認為它們在運輸中不太結實。
The next time you see a watch, look at the back. You may see the English words Made in China.
下次你瞧見一塊手表是，瞧瞧它的背面。你也許能看到“中國制造”的英語字樣。