单词：radicals
n. an atom or group of atoms with at least one unpaired electron; in the body it is usually an oxygen molecule that has lost an electron and will stabilize itself by stealing an electron from a nearby molecule
n. a person who has radical ideas or opinions
radicals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。
- The free radicals may also disrupt other parts of cells directly.这些自由基也可能会直接破坏细胞的其他地方。
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