Use weights that you can easily lift 15 to 20 times before starting to feel exhausted. This will tone and strengthen your body without building bulk.

选择那些轻松举上15到20次却并不会让你精疲力竭的哑铃，会让你更结实有力同时不会产生大块的肌肉。

youdao

Sloping walls on the bulk of the building create an optical illusion.

大楼主体的斜墙给人造成一种视错觉。

《柯林斯英汉双解大词典》

The great bulk of the building reared up against the night sky.

夜幕下，巨大的高楼显得阴森森的。

《牛津词典》

Its shipbuilding activities include the building of bulk carriers, crude oil carriers, liquefied petroleum gas (LPG) carriers and submarines.

FORBES: Hyundai Heavy Industries

Promise to pull out 9, 000 of the roughly 17, 000 now there before Christmas and fobbing the bulk of the nasty, protracted business of "nation-building" off onto multinational forces.

CENTERFORSECURITYPOLICY: Foreign policy success shrinkage

Clearwire is not building a nationwide system but will focus on large communities with population density where the bulk of the demand is centered.

FORBES: Sprint Set to Bail on LightSquared