笑逐颜开逐：驱使；颜：脸面。笑得使面容舒展开来。形容满脸笑容，十分高兴的样子。
Laugh by: drive; Yan: face. Smile to face stretch. Describe the smile on his face, very happy.
怡然自乐〖解释〗怡然：喜悦的样子。形容高兴而满足。
Be contented and happy, contented " explanation: joy. Describe a happy and satisfied."
怡然自乐〖解释〗怡然：喜悦的样子。形容高兴而满足。
Be contented and happy, contented " explanation: joy. Describe a happy and satisfied."
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