bulk mass的用法和樣例：
例句
- 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結合能，甚至在室溫下在大體積的晶體中激子仍很穩定。 - It is a difficulty to guarantee the high quality for bulk concrete construction in the high temperature weather.
在高溫天氣如何保證要求高的大體積混凝土的施工質(zhì)量是一個(gè)難題。
