样品平均 meaning in Chinese

sample average
sample mean

At last , the catalyst is prepared after roasting the gel for 3h at 700
经透射电镜观察，催化剂样品平均粒径为20 50nm 。
The results showed that with 1 . 5wt % tih2 , the porosity was the maximal and above 35 / min average heating rate , the porosity clearly increased ; and along with the increasing of compact pressure , preservation time and heating temperature , the porosity would be enhanced
分析结果表明：当发泡剂tih _ 2含量为1 . 5wt时，获得的样品平均孔隙率最大。平均加热速率达到35 min以上时，平均孔隙率增加显著。随着压实力的增大、保温时间的增加和样品最终加热温度的升高，平均孔隙率均会增加。
The nutrient potassium of water - soaking solution for two kinds of coatedcompound fertilizer was determined by atomic absorption spectrophotometry , in which the recovery rate was 107 . 89 % for 6 samples and the correct , sensitive and quick potassium is provided for the formula design and release feature research of coated compound fertilizer
摘要用火焰原子吸收法，对两种复合肥料及其包膜肥料水溶出液中的养分钾进行了测定，测试中的6个样品平均加样回收率为107 . 89 % ，为包膜复合肥料配方设计和释放特性研究提供了准确、灵敏、快速的定钾方法。