The difference between a helping hand and an outstretched palm is a twist of the wrist.
援助之手和摊开的巴掌的区别就是转一下手腕。
Imagine if everyone did that. As you file out of the airplane, there's the pilot, standing with his palm outstretched like a doorman who just let you into the hotel: "Hope you enjoyed your flight."
想象一下如果每个人都这样做，当你从飞机里出来的时候，飞行员在门口恭候，像酒店的门童一样：“希望你飞行愉快。”
If you have to point something out, do so by gesturing towards the object, with the palm of your hand flat, facing upward, and your fingers outstretched.
如果你得指出某个东西，打手势指向那个物体，手掌摊平，掌面朝上，手指尽可能伸展。
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