bulk

大部分、大多数、主体常用 the bulk of

The bulk of our income goes toward rent and food.

我们收入的大部分都用在房租和伙食上。

体积、容积、大小

The package is light, but its bulk makes shipping expensive.

这个包裹很轻，但体积太大，运费很贵。

大量、大批常用于 in bulk

Restaurants usually buy rice and oil in bulk.

餐厅通常会大量采购米和油。

庞大身躯、庞然大物

He slowly lowered his bulk into the narrow chair.

他缓缓把庞大的身躯塞进那张窄椅子里。

大量的、大宗的、散装的

We got a discount on a bulk order of printing paper.

我们大量订购影印纸，拿到了折扣。

增肌、变壮口语；bulk up

He lifts weights every day to bulk up before the season.

他每天重训，想在球季前把肌肉练壮。

增加份量、加大体积bulk out

Adding beans will bulk out the soup without extra cost.

加点豆子就能让汤更有份量，又不会多花钱。