1. I've been going to the gym every day to tone up my muscles.
我每天都去健身房，为了让肌肉更紧致。
2. A bit of music might help tone up the atmosphere of the party.
一点音乐也许能让派对的气氛变得更活跃。
3. She needs to tone up her health through better nutrition.
她需要通过更好的营养来增强体质。

A: You look great! Have you been exercising?
A：你看起来棒极了！你最近在健身吗？

B: Yes, I've been doing some weight training to tone up.
B：是的，我一直在做一些重量训练来让肌肉更有型。

1) 健身术语，指通过抗阻训练增加肌肉紧实度。

2) 生活方式术语，指让精神面貌焕然一新。

3) 环境描述，指让气氛变得热闹。

1. 使（肌肉）变得紧致；使（精神/气氛）活跃

e.g. She wants to tone up her arms.
她想让她的手臂线条更紧致。

verb phrase

1. To make something or someone more energetic, lively, or physically firm and healthy.