Pma.
[医] 龈炎发病率(P为乳头,M为龈缘,A为龈附丽)
🗣️ 情景例句
Life is full of ups and downs.
生活充满起伏。
A drowning man will catch at a straw.
溺水者见草也要抓；急何能择。
Really? You came at a bad time of year, I'm afraid!
真的？恐怕你来的不是时候。