密度 1.(密集的程度) density; thickness 火力密度 density of fire; 兵力密度 density of troops; 那個(gè)國家的人口密度為每平方英里685人。 the population density of that country is 685 per square mile.2.[物理學(xué)] (物體的質(zhì)量和其體積的比值) density 電流密度 current density; 海水密度 seawater density; 水銀的密度比水大得多。 mercury has a much greater density than water.; 密度計(jì) densimeter; densitometer; density gage; density indicator; gravitometer
Results found that the photocatalytic activity in low environment temperature ( 8 ) was higher than in high environment temperature ( 30 ) . this phenomenon indicated that the density of surface hydroxyl groups was most important for the photocatalytic activity 研究發(fā)現(xiàn)了低環(huán)境溫度時(shí)( 8 )的光催化活性反而比高環(huán)境溫度( 30 ‘ c )的光催化活性高的異?,F(xiàn)象,該現(xiàn)象表明tioz粒子的表面輕基密度對光催化活性具有極大的影響。