"只送不卖"是指只提供产品或服务,而不收取任何费用。这个短语可以用英文表示为 "give away for free" 或 "give away without charge"。

关于这个短语的来源,它源于英语中的动词 "give",意思是"给予",后面加上 "away" 意思是"送出",再加上 "for free" 或 "without charge" 意思是"免费"。

下面是一些使用这个短语的英文例句,以及它们的中文翻译:

"The company is giving away free samples of their new product at the trade show."(公司在展会上免费提供新产品的样品。)
"We're giving away tickets to the concert for free to the first 100 people who come to our booth."(我们将在摊位前100位来访者免费赠送音乐会门票。)
"The charity is giving away free meals to the homeless during the winter months."(这个慈善机构在冬季期间免费为无家可归者提供餐食。)