Maintaining a high body temperature through sheer bulk is called gigantothermy.

通过绝对体积来维持高体温的方法被称为惯性恒温性。

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They feel I need to bulk up, and to improve my upper body strength.

他们觉得我需要变粗壮些，并增强上身的力量。

《柯林斯英汉双解大词典》

Various physical changes are possible, including increased body fat; reduced muscle bulk, strength and endurance; and decreased bone density.

体格也可能发生各种变化，如身体变胖、肌肉减少、力量和耐力减弱骨骼密度降低。

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Caltech's grant was for finding a way to equip the body to fight a disease that it may not be prepared to tackle, such as AIDS. Most vaccines and therapies try to bulk up the body's existing defenses, say, by boosting the immune system.

FORBES: Chutzpah Science

The Tequila Regulatory Council, a quasi-governmental body, claims to have evidence that bulk handlers on both sides of the border have tampered with the product or, worse, blended different varieties of tequila.

ECONOMIST: Protectionism, or quality control?