bulk up

柯林斯词典

bulk up (bulking,bulked,bulks)

• 1. PHRASAL VERB If someone bulks up or if they bulk up their body, they put on weight in the form of extra muscle. 使变粗壮; 变粗壮

  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。

  My friend is obsessed with going to the gym and has really bulked up her arms. 我朋友迷上了去健身房，她确实把胳膊练得粗壮了。

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