Periodontosis
[医] 牙周变性
🗣️ 情景例句
In two hours and fifteen minutes
再过两小时十五分钟
Should I take the bus?
要乘公共汽车吗？
In our won solar system, for example, Venus is far too hot and Mars is far too cold to support life.
举例来说，在我们的太阳系里，对于生命来说，金星的温度太高，而火星的温度则太低。