turning free

基本解释

Idle Roller: Free turning non-sprocketed rollers for guiding film through its appropriate path.
空转轮：自由转动的，非扣片的卷轴，用于引导胶片通过正确的路径。
fanpaiwang.blog.sohu.com
The Standard tapped into an expanded reader segment and opened up new revenue sources after turning into a free newspaper.
《英文虎报》转型为免费报章，吸纳新的读者，同时亦开拓新收入来源。
B. Turning solar energy into free hot water, solar water heaters allow you to enjoy the pleasure anytime you want—a genuine one-time investment for life-time benefit.
太阳能热水器主要利用天然的阳光能源，能采出免费的热水，无论何时尽情享用，真正的一次性投资终身受益。
ilinyi.net

So what started as a fight between Darfuris and Arabs may be turning into a free-for-all, not least for profiteers.
ECONOMIST: Sudan
Over the past few months, there have been a string of online games turning to the free-to-play model to attract new players, and now a fairly big title is trying it on for size.
FORBES: Valve's Team Fortress 2 Goes Free to Play
As a result, Ubisoft is taking a cue from numerous iOS and Android developers, turning their attention to free-to-play games.
FORBES: Department of Justice Goes On Offensive Against Android Piracy