sod bottom

For some people, the road to immediate satisfaction is laid with A piece of sod has grass on the top and soil on the bottom.

铺草皮可以直接满足有些人的需求，草皮的上面是草，底部是沙土。

The rate of bottom sediment oxygen demand of stable ponds in North China was discussed in the paper. It was found that SOD value decreased with sewage treatment and purification. SOD values of all ponds ranged between 0.798g/m2?

华北稳定塘各塘底泥耗氧速率（SOD）值范围在0.78～2.2271g/m~2·d之间。

This paper has described the characteristics of sediments, and established a multi-linear and progressive regression model of oxygen consumption of bottom mads, and refloated SOD model in the Tuojiang river.

本文论述了底泥的特征，建立了沱江底泥耗氧的多元线性回归模型和再悬浮SOD模型。

A piece of sod has grass on the top and soil on the bottom.

一块儿草皮的顶部是草，底部是土壤。