cost-free的用法和样例：
例句
用作形容词 (adj.)
- Anything free is worth what you pay for it.
任何免费的东西与你所付出之物等值。 - Free operating systems could not be installed.
免费的操作系统不能被安装。
用作副词 (adv.)
- This ticket can entitle you to have a free meal in this hotel.
这张票可以让你在这个旅馆免费地吃一顿饭。
词汇搭配
- cost free 免费
- free of cost 免费(奉送)
