bulk mass

• 大体积

bulk mass的用法和样例：

例句

1. Because of this large binding energy, the exciton is stable at room temperature even in bulk crystals.
   正是由于它高的激子结合能，甚至在室温下在大体积的晶体中激子仍很稳定。
2. It is a difficulty to guarantee the high quality for bulk concrete construction in the high temperature weather.
   在高温天气如何保证要求高的大体积混凝土的施工质量是一个难题。