常見(jiàn)例句The titania photocatalysts have been research quartern century. It has characteristic of photocatalysis which is excellent performance of environmetal cleanup. 二氧化鈦光觸媒已發(fā)展了25年，它具有光催化的特性，是一非常出色的環(huán)境清淨(jìng)的光觸媒。quartern circle 四分圓quarternn. 四等分;四分之一;四分之一品脫 返回 quarternate