柯林斯詞典infinitesimal /??nf?n??t?s?m?l/ 1. ADJ Something that is infinitesimal is extremely small. 極微小的[正式] ...mineral substances present in infinitesimal amounts in the soil. ...土壤裡含有的極微量的鑛物質(zhì)。 返回 infinitesimal劍橋詞典extremely small 極微小的 The amounts of radioactivity present were infinitesimal. 存在的放射量極小。 返回 infinitesimal