Vectorcardiographic
心电向量描记法的
🗣️ 情景例句
I like to snack between meals
正餐间我爱吃点零食。
No. You should have taken the Yellow Line bus. You can get one at the next stop.
不是。你该乘黄线车才是。到下一站你可以搭上。
She has been helping her husband for thirty years now.
她已经帮了她的丈夫30年了。