Gingivitis
n. 齿龈炎
✅ 同义词
📖 牛津释义
gingivitis
n[U]
(medical 医) inflammation of the gums 龈炎.
🗣️ 情景例句
I have to turn off the lights,
我得关掉灯，
I wonder why they're angry.
伙计，他们为什么生气？
it is extremely difficult to estimate the true value of the services which people perform for us.
但要估算别人为我们为所提供的服务的价值却是极其困难的。