n. the property of a body that causes it to have weight in a gravitational field
n. an ill-structured collection of similar things (objects or people)
n. (Roman Catholic Church and Protestant Churches) the celebration of the Eucharist
n. a body of matter without definite shape
n. 块, 大多数, 质量, 大量, 群众, 弥撒
a. 群众的, 大规模的, 整个的
vt. 使集合, 集中
vi. 聚集
1. The mass of the object is too heavy to lift.
这个物体的质量太重，无法提起。
2. There was a mass of people at the concert.
音乐会上有一大群人。
3. The scientist measured the mass of the sample carefully.
科学家仔细测量了样本的质量。