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Don't arch your back, keep your spine straight.是什么意思？

Don't arch your back, keep your spine straight.

别佝着背，把腰挺直。

相关词汇
arch your back keep spine straight

arch

n. 弓形，拱门，拱形物，足弓，齿弓；vt. （使）弯成拱形，用拱连接，向后弯；vi. 拱起，成为弓形；adj. 主要的，首要的，调皮的，淘气的；

your

pron. 你的，你们的，尊，玉，乃；

back

n. 背，背部，背面，反面，后面，后部，（椅子等的）靠

keep

vt. 保持，保留，遵守，阻止；vi. （食品）保持新，保持健康；n. 保持，保养，供养，抚养，生活，生计，饲料；牧草；

spine

n. 脊柱，脊椎，（动植物的）刺，书脊；

straight

adj. 直的，连续的，直率的，整齐的；adv. 直地，直接地，坦率地，立即；n. 直线，直线部分；
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