total mass

例句：

1. 1. The total massof the planet is approximately 5.98 billion tons.
   这个行星的总质量大约是59.8亿吨。
2. 2. Thetotal mass of the materials used in theconstruction was over 100,000 tons.
   建造中使用的材料总质量超过10万吨。
3. 3. Thetotal mass of the cargowas calculated based on the dimensionsand weight of each item.
   货物的总质量是根据每个物品的尺寸和重量计算得出的。