Whether you walk across the stage or stand behind a lectern, try to maintain good posture.
无论你是在舞台上走动或站在讲台后面，尽量保持好的姿势。
Why do humans walk on two legs? Our ancestors evolved an upright posture well before our large brains or stone tools even appeared.
在我们的大脑进化和石器工具出现以前，我们的祖先就已经进化成为了直立的姿势。
Take a few moments before you walk in to a room and realign your posture.
在走进房间之前花些时间调整你的姿势。
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