在做这个动作时，双脚与肩同宽，背挺直，保持重心稳定。

To do a squat to biceps curl, you start with your feet about shoulder-width apart, spine straight and your core stable.

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看着那个新型相机，那个肩宽背阔的年轻人惊奇得张大了嘴巴。

Looking at the new-type camera, the young man with broad shoulders was surprised with his mouth wide open.

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腰部短、宽且非常轻微地圆拱，但不足以影响背线。

Loin short, broad and very slightly arched, but not enough to affect the topline appreciably.

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