standard gravity value

例句：

1. 1.The standard gravity value of the sample is 0.5 g/cm³.
   样品的标准重力值为0.5克每立方厘米。
2. 2. The standard gravity value of the sample is 0.5 g/cm³.
   样品的标准重力值为0.5克每立方厘米。
3. 3. The standard gravity value of the sample is 0.5 g/cm³.
   样品的标准重力值为0.5克每立方厘米。