Bent your knees, but keep your back straight.

屈膝，保持背部挺直。

youdao

Set your feet shoulder-width apart, and keep your knees slightly bent, back straight, and eyes focused straight ahead.

双脚与肩同宽，保持膝部稍弯，后背挺直，双眼注视前方。

youdao

Set your feet shoulder-width apart, and keep your knees slightly bent, back straight, and eyes focused straight ahead.

双脚与肩同宽，保持膝部稍弯，后背挺直，双眼注视前方。

youdao