微笑是会感染人的。做一个积极乐观的人，跟大家一起分享你的快乐。
A smile is infectious. Be a positive person and share your smile with others.
做一个乐观的人，为了所有关心和爱着你的人。
Do an optimistic person, for the sake of all the people who care and love you.
每个人都想要变得乐观。 但是，每当生活让你变得沮丧，你就很难去做一个乐观的人。
Everyone wants to be an optimist, but it's not always easy when life gets you down.
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