Bivariate
[医] 二元变量
🗣️ 情景例句
These are wonderful--
这些好得很--
The many children of that family used to play together for hours.
那一家的孩子们常常大伙一起玩上几个小时。
The girl 'gave' her mother a free dress once a week!
那姑娘每星期“送”她母亲一件免费的衣服！