人类的站立姿态以及长度适宜的头发有利于人类祖先跑得够远够快来猎食。
Because our upright stance, and relative lack of hair, may have enabled our human ancestors to run far and fast enough to capture their prey.
站立姿态应站直，因你是主持者，众人注意力会集中于你，你的姿势不应成为一个防碍。
Standing: Stand up straight. You are presiding and the focus of attention is on you. Your posture should not be a distraction.
站立姿态应站直，因你是主持者，众人注意力会集中于你，你的姿势不应成为一个防碍。
Standing: Stand up straight. You are presiding and the focus of attention is on you. Your posture should not be a distraction.
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