mud density indicator

例句：

1. 1. The engineer used the mud density indicator to measure the soil's moisture content.
   工程师使用泥泞密度指示器来测量土壤的湿度含量。
2. 2.The farmers used the soil moisture probe to determine the optimal planting time for their crops.
   农民们使用土壤湿度探测器来确定他们作物的最佳种植时间。
3. 3. The construction crew used the mud density indicator to ensure that the foundation was stable before starting the project.
   施工队使用泥泞密度指示器来确保地基稳定，然后才开始进行项目。