separated aggregate meaning in English

分级骨料

The hot, massive, high-luminosity stars of spectral types o and b are not distributed uniformly over the galaxy but are grouped into extensive, separate aggregates that have come to be called associations .
O型和B型的大质量高光度热星在银河系中分布并不均匀，而是聚集成为分开的大星群，即所谓星协。
These machines create a highly abrasive washing action that separates aggregate from dust , soluble clay , and wood particles
这种机器能产生强烈的摩擦，揉搓，清洗动作将砂石与粘土及粉尘分离开。
The hot , massive , high - luminosity stars of spectral types o and b are not distributed uniformly over the galaxy but are grouped into extensive , separate aggregates that have come to be called associations
O型和b型的大质量高光度热星在银河系中分布并不均匀，而是聚集成为分开的大星群，即所谓星协。