Always stay in a good mood when finishing your goals (get your mind right AND SMILE).
当去完成你的目标的时候，永远保持一个好的，很棒的心情。
It's universally acknowledged that smile is as bright as sunshine, so we hope our teachers should stay in a good mood as possible as they can.
大家都知道笑脸是阳光。因此我们希望老师上课不要太严肃。
Keeping a good mood makes us stay in high spirit and concentrate on our work or study, which is a premise for our efficient work or study.
保持好的心情可以使我们停留在高精神层次，专注于我们的工作或学习，是我们有效工作或学习的前提。
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