求翻译：While in school，sometimes you are tired of your lessons，but have you ever noticed the happy smile on your teacher’s face when you did a good job？是什么意思？

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悬赏分：1 - 离问题结束还有

While in school，sometimes you are tired of your lessons，but have you ever noticed the happy smile on your teacher’s face when you did a good job？

问题补充：

匿名	2013-05-23 12:21:38 While in school，sometimes you are tired of your lessons，but have you ever noticed the happy smile on your teacher’s face when you did a good job？

匿名	2013-05-23 12:23:18

匿名	2013-05-23 12:24:58

匿名	2013-05-23 12:26:38

匿名	2013-05-23 12:28:18

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