free radicle的用法和样例：
例句
- In some cases free radicals can be detected.
在某些情况下可以测出自由基来。 - A free radical is a molecular fragment having an unpaired electron.
自由基是一种具有未配对电子的分子碎体。 - Vinyl ethers can cure by both cationic and free radical mechanisms.
乙烯醚可以都阳离子和游离基反应固化。 - Strong sunlight and free radicals in the air serve to accelerate ageing.
当然可以，因为阳光中强烈的紫外线和空气中的游离基，会加速皮肤老化。
