Hbcag
乙型肝炎核心抗原
🗣️ 情景例句
This is Alexandra Pappas, and this is my grandson Robbie,
这是Alexandra Pappas ，这是我孙子Robbie
I can see you have put a lot of time into it.
我相信你在制定这个计划上一定花了不少精力吧。
He has pointed out that the tree is a useful source of income as tour-ists have been coming from all parts of the country to see it.
他指出，由于人们从全国各地纷纷前来参观这棵树，