concentration of sth 集中;聚集
high concentration 高浓度,高强度
stress concentration 应力集中
concentration on 注意力集中于…
low concentration 低浓度;低集中度
gas concentration 气体浓度;气含量
sediment concentration 含沙量;沉积物浓度
solution concentration 溶液浓度
ion concentration 离子浓度
dust concentration 粉尘浓度;尘末浓度
mass concentration 质量浓度
concentration camp 集中营
initial concentration 起始浓度;初浓度
salt concentration 盐浓度,含盐浓度
concentration ratio 集中度;浓度比率
concentration factor 集中系数;浓缩系数
alcohol concentration 酒精浓度
concentration polarization 浓差极化
stress concentration factor 应力集中系数
volume concentration [化]体积浓度;体积密度