Simple gingivitis
[医] 单纯性龈炎
🧩 词语组成解析
n. 齿龈炎
🗣️ 情景例句
It was only a tummy ache.
仅仅是肚子有点痛。
How much is it to rent an economy car?
租一辆经济车要多少钱？
So it is a comparatively simple step from locating the sea bottom to locating a shoal of fish.
从测定海深到测定鱼群，这一进展比较容易。