Britesorb
硅酸镁盐
🗣️ 情景例句
It's a serious matter for a lot of us.
对我们许多人来说这可是个严重的问题。
This is my third year of college, I'm a junior.
这是我上大学的第三年，我是三年级学生。
Do you have some time tomorrow?
明天有空吧？