基密度 meaning in English

basal density

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
研究发现了低环境温度时( 8 )的光催化活性反而比高环境温度( 30 ‘ c )的光催化活性高的异常现象，该现象表明tioz粒子的表面轻基密度对光催化活性具有极大的影响。