| 释义 |
concentration variation
基本例句
浓度变化
Although all plants normally contain fluorine, the concentration varies greatly.虽然在正常情况下，所有的植物都含氟，其浓度变化很大。
Three parameters are designed to study the function of photocatalyst, which are spray layers of photocatalyst, spray area ratios and concentration of formaldehyde.每小时纪录甲醛浓度变化，以该浓度变化评估二氧化钛光触媒去除甲醛之效能。 |