当我开始上小学的时候，我的老师魏先生告诉了我微笑的重要性。
When I started to go to primary school, my teacher, Mr. Wei told me the importance of smiling.
接着是第二段，即从不同的方面来探讨微笑的重要性。
The importance of smile can be explored from different aspects.
当我开始上小学的时候，魏先生就开始告诉我微笑的重要性。
When I start to go to primary school, Mr. Wei start to tell me the importance if smile.
女士们，先生们，今天我想谈谈微笑和善良的重要性。
Ladies and Gentlemen, today I'd like to talk about the importance of smiling and kindness.
女士们，先生们，今天我想谈谈微笑和善良的重要性。
Ladies and Gentlemen, today I'd like to talk about the importance of smiling and kindness.
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