Freesen弗雷森freeadj.自由的；免费的；畅通的；没有…的；未使用的；空闲的；随意的v.释放；使自由；使摆脱；解除；使可用于(某目的)adv.免费地；自由地Freer's tonsil seizing forcepsfree walkover forward on floor地板上腾身前空翻free radical chain degradation自由基链降解freely permitted or invited.被同意的或被邀请的。free anthraquinones of rhubarb大黄游离蒽醌free molecule flow wind tunnel自由分子流风洞free field voltage sensitivity自由场电压灵敏度freezing basement rock section冻结基岩段Free Speech Online and Offline线上线下的自由言论freezing rain and snow hazards雨雪冰冻