Selectins
(selectin 的复数) 选择蛋白
🗣️ 情景例句
How many people are there in your family?
您家有几口人？
There is no sense in criticizing him.
批评他也没有用。
Were you in San Francisco at the time of the big earthquake in 1989?
1989年旧金山大地震时，你在那儿吗？