Something may appear to be free of charge, but there may be a hidden cost.

有些东西看上去不用掏钱，但总有些隐含费用。

youdao

Even in cases where the OS/applications can be upgraded, this is unlikely to be free of charge.

即使操作系统/应用程序可以被升级，但这也不可能是 免费的。

youdao

These credits would be either distributed free of charge or auctioned to major emitters of greenhouse gases.

配额通过免费或者拍卖的方式发放给温室气体的主要排放者。

youdao

Owners of models in the affected VIN range are being informed by letter from Wednesday and are asked to contact their local MG Rover dealer, who will arrange for the rear wheel bearings to be replaced free of charge.

BBC: Mini Classic in safety recall

Schumer (D-NY) urged the device's maker, Apple, on Thursday to provide fresh answers about the source of the so-called "death grip" glitch that causes poor reception, and called for a fix to be identified and provided free of charge to existing customers.

ENGADGET: Senator Chuck Schumer writes open letter to Steve Jobs, world is officially doomed

The Maze and Crumlin Road prisons, security bases at Ebrington and Magherafelt in County Londonderry and the Malone Road base in Belfast will be handed over free of charge to be redeveloped.

BBC: Cash boost for NI