residual magnesium content

例句：

1. 1. The residualmagnesium content in the soil iscrucial for plant growth.
   土壤中的残余镁含量对植物生长至关重要。
2. 2. The manufacturerhas to ensure that theresidual magnesium content meetscertain standards.
   制造商必须确保残余镁含量符合某些标准。
3. 3. The researcher analyzed theresidual magnesium content in various samplesto understand its impact on the environment.
   研究人员分析了各种样本的残余镁含量，以了解其对环境的影响。