mass基本解释
n,块，团；群众，民众；大量，众多,同近
The road was blocked by a solid mass of protesters..道路被密密麻麻的抗议者阻塞了。
块，团；群众，民众；大量，众多；质量英释nna large crowd
rock mass,岩体；岩块，岩块体；岩石层.短语
