mass noun
1- the mass or magnitude of something large（巨大的）容积, 体积; （大）量：
the sheer bulk of the bags.
这些袋子的巨大容量。
1.1
- count noun a large mass or shape, for example of a building or a heavy body大块, 大的外形（如建筑物或大块状的实体）：
he moved quickly in spite of his bulk.
尽管块头很大, 但他移动的速度还是很快。
1.2
- as modifier large in quantity or amount大数量：
bulk orders of over 100 copies.
超过100册的大宗订单。
1.3
the bulk
the majority or greater part of something大部分, 一大半：the bulk of the traffic had passed.
车流的大部分都已经过去了。
1.4
- roughage in food（食物中的）纤维质：
bread and potatoes supply energy, essential protein, and bulk.
面包和土豆提供能量、必要的蛋白质和纤维质。
1.5
- cargo in an unpackaged mass such as grain, oil, or milk散装货物。
1.6
- Printing the thickness of paper or a book【印刷】（纸或书的）厚度。
1
- no obj. be or seem to be of great size or importance显得很大（或很重要）：
territorial questions bulked large in diplomatic relations.
领土问题在外交关系方面显得很重要。
2
- with obj. treat (a product) so that its quantity appears greater than it in fact is使（产品）数量显得很大：
traders were bulking up their flour with chalk.
商人们在面粉里搀白垩以加重分量。
2.1
- no obj.
bulk up
build up flesh and muscle, typically in training for sporting events（尤指在为体育比赛做准备的训练中）增强肌肉。
2.2
- （常作be bulked）combine (shares or commodities for sale)结合（待售的股票或商品）。
短语
in bulk
1
- (of goods) in large quantities and generally at a reduced price（商品）量大而折价销售的：
retail multiples buy in bulk.
零售连锁店均进行大宗采购。
2
- (of a cargo or commodity) loose; not packaged（货物商品）松散的, 散装的：
sugar is imported in bulk and bagged on the island.
进口的糖是散装的, 上了岛以后才用袋子进行了包装。
词源
Middle English: the senses 'cargo as a whole' and 'heap， large quantity' (the earliest recorded) are probably from Old Norse búlki 'cargo'; other senses arose perhaps by alteration of obsolete bouk'belly， body'.