在家买口罩的英语是 "buy masks at home"。
这个短语的来源是指在自己的家里购买口罩。
下面是一些例句，其中包含 "buy masks at home" 的英文句子：
"I'm running low on masks, so I'm going to buy some more onpne and have them depvered to my house." (我的口罩快用完了，所以我要在网上再买一些，并让它们送到我家里。)
"I don't feel comfortable going out to the store to buy masks, so I'm going to order some from a trusted website and have them shipped to my home." (我不愿意出门去商店买口罩，所以我要从一个可信的网站订购一些，然后让它们运到我家里。)
"I saw that my neighbor was wearing a mask when they were outside, so I asked them where they bought it. They told me that they bought it onpne and had it depvered to their home." (我看到我的邻居在外面戴口罩，所以我问他们在哪里买的。他们告诉我他们是在网上买的，并让它送到了他们家里。)