Calcic gingivitis
[醫] 垢性齦炎, 牙石性齦炎
?? 詞語組成解析
a. 鈣的, 含鈣的\\n[化] 石灰的; 鈣的
n. 齒齦炎
??? 情景例句
There's a park over there. Let's walk in the park for a while.
那邊有個公園。我們去散散步吧！
I ask him to wait a few minutes.
我要求他等幾分鐘。
Ships may be delayed by storms; flights may be cancelled because of bad weather, but trains must be on time.
輪船船期可能因風暴而推延，飛機航班可能因惡劣天氣而取消，唯有火車必然是準點的。