If you ever need a reason to be happy, think about the wonderful people you might meet and impress with a cheerful smile.
如果你需要一个快乐的理由，想想你可能会遇到的那些美好的人，给他们一个愉悦的微笑。
Having clean, white teeth can improve your appearance and make you want to flash your smile to everyone you meet.
拥有干净洁白的牙齿可以让你变得更漂亮，让你想要对所有遇见的人展现自己的微笑！
Then move your eyes back up to meet theirs and smile demurely.
然后再次和他们眼神交汇，正经地笑着。
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