Alveolar gingiva
[醫] 牙槽齦
?? 詞語組成解析
a. 牙槽的, 肺泡的\\nn. 齒槽音
n. 齒齦
??? 情景例句
If you don't apply to the relevant department your passport will never be approved.
如果你不向有關部門申請，你就得不到護照。
What do you call this in English?
這個用英語怎么說？
For our purposes, we are concerned only with one kind of cost----
就我們的目的而言，我們只關心一種費用-