It will place both arms on a table to maintain its balance when trying to sit down in a chair, or use one arm for support when taking a big swinging kick at a ball.

它坐在椅子时会把双手扶住桌子以保持自己平衡，或用力踢一个球时会用一个手扶住物体来支承。

youdao

I put my hand one his arm to regain balance.

我把手放在它的手臂上来重新获得平衡。

youdao

The mass is suspended from one arm of the balance.

ECONOMIST: Weighing a kilogram

To warm up, she'll do balance-based exercises including a one-arm, one-leg plank to strengthen her core.

WSJ: To Stay on Top in Tennis, Time Off Counts