sellers
A seller of a type of thing is a person or company that sells that type of thing.
a flower seller.
一个卖花的人。
In a business deal, the seller is the person who is selling something to someone else.
vendor
In theory, the buyer could ask the seller to have a test carried out.
在理论上,买方可以要求卖方进行一次产品检测。
If you describe a product as, for example, a big seller, you mean that large numbers of it are being sold.
The gift shop's biggest seller is a photo of Nixon meeting Presley.
这家礼品店最畅销的商品是一张尼克松会见普雷斯利的照片。