Cariogenicity
生龋性
🗣️ 情景例句
That's all right. We don't go to bed early.
那没关系。我们不会睡得太早。
Their son will start college in September.
他们的儿子将于九月份开始上大学。
The tour should last about an hour and a half.
这次参观大概需要一个半小时。