oxygen [??ks?d??n] n. 氧气，氧
翻译　Materials such as paper that burn in air will burn more vigorously in oxygen（在氧气中会燃烧得更加剧烈）.
participate [pɑ??t?s?pe?t] v.参与，参加
拆分　parti（部分，分开）+ cip（拿）+ ate（动词后缀）→拿到这部分中→参加
例句　In Europe, more than 140 000 students participate in the Erasmus program each year, taking courses for credit in one of 2 200 participating institutions across the continent.