An open mouthed smile, where the lips are stretched and the teeth are on display, exudes confidence, warmth and a positive energy.
张开嘴的大笑，嘴唇向外扩张露出牙齿，这样的笑散发出自信，热情和积极的能量。
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Simulation results show that this method can greatly reduce dynamic false contour and overcome the shortcoming of insufficient gray levels in pure stretched-out coding display.