Tracheid
n. [植]管胞
??? 情景例句
If only we could bottle the fresh air.
要是我們能用瓶子將新鮮空氣裝回去多好。
I lack words, with which to express my thanks.
我無法以言語來表達我的感激之情。
What's your trouble?
你哪兒不舒服？