Collitis
[医] 膀胱三角炎
🗣️ 情景例句
Happy Mother's day!
母亲节快乐。
To be virtuous is to do good.
行善是美德。
In this way, we have learned all that we know of the laws of astronomy,
例如，用这种方法，我们完全掌握了天文学的规律。