Pericemental glands
[醫] 根周腺, 牙骨質周腺
?? 詞語組成解析
[醫] 牙周膜的
n. 腺體（gland的復數）；氣封
??? 情景例句
Help! Help! I can't swim!
救命！ 救命！ 我不會游泳
To skydive
漫游太空
She's been there for two months. She's been there since September.
她進校有兩個月了。她自9月份起便在那兒學習了。