When someone you know comes to visit unexpectedly and inconveniently, often staying for a long time, and you can't tell them to leave without being rude.

你所认识的某人突然来找你，通常都要待上很长时间，虽然造成你的不方便，但是也不愿意显得无理请他离开。

youdao

Fotobar faces competition from chain drugstores and other retail sites that allow customers to print their digital pictures, not to mention an array of websites that will deliver prints without someone ever having to leave their computer.

NPR: 1st Polaroid-Branded Photo Store Opens In Fla.

Imagine if instead of trying to guess at ROI, a retailer could literally get someone to buy something without having to leave Facebook?

FORBES