I swept my open right hand in toward my body, palm (掌心) up.

我右手张开掌心朝上，向我身体扫过。

youdao

She raised her head and nonchalantly extended her hand, the palm up.

她抬起头，若无其事的摊开手掌，掌心向上。

youdao

Do not stick your index finger and middle finger up with the palm of your hand facing towards you in the United Kingdom; it is the equivalent of giving someone the finger.

在英国，不要在手掌面向自己时竖起食指和中指；这无异于直接对别人竖中指(在西方社会一种非常不礼貌的行为)。

youdao

Warmth is nonverbally displayed by signals that include open body postures, palm-up hand gestures, positive eye contact, synchronized movements, head nods and smiles.

FORBES: Body Language Advice for Rick Perry

Were you to put up your hand, palm fully exposed as if making a stop sign, that could put you at a distinct disadvantage: impersonating a law-enforcement officer, or at least a crossing guard, without any weapons to back it up, and the driver for all you know with unaddressed anger-management issues behind the wheel of a 7, 000-pound Escalade.

WSJ: Yielding With a Purpose

But even as Bush asked Dick Cheney to head a transition team and named Andrew Card his chief of staff, the Democratic faithful were primed to fight on--especially after Harris decided to leave out the results of the hand count Palm Beach canvassers stayed up all night to produce.

CNN: Bush's Contested Lead