1、The total surface soil heat flux was -0.
表層土壤年總熱通量為-0。

2、Leaf area index and surface soil moisture are two basic factors of controlling evaporation.
葉面積指數(shù)和表層土壤含水量是控制蒸發(fā)的兩個基本因素。

3、The sample is from the surface soil that scientists say covers a layer of ice.
科學(xué)家稱上面覆蓋一層冰的土壤樣品是來自火星表層。