活动率active: adj. 1.活动的,有活动力的;【生物学】活性的;【电 ...ratio: n. (pl. ratios) 1.比,比率,比值;比例 ...active alkali to wood ratio: 碱比active chemical to wood ratio: 碱比active to passive ratio: 动态与静态设施比例下载手机词典可随时随地查词查翻译