linear density

例句：

1. 1. The linear density of the material is crucial for its strength.
   材料的线性密度对其强度至关重要。
2. 2. The linear density of the data is important for analysis.
   数据线性密度对于分析很重要。
3. 3. The linear density of the soil is an important factor in determining its fertility.
   土壤的线性密度是决定其肥力的一个重要因素。