In the summer of 1997, at the age of fifteen, I learned a valuable life lesson.
1997年的夏天，在我15岁的时候，我学到了人生的重要一课。
Jack took a lesson from his colleague, Mark, and showed up to work fifteen minutes early each day.
杰克从同事马克身上得到了教训，之后每天提早十五分钟上班。
Jack took a lesson from his colleague, Mark, and showed up to work fifteen minutes early each day.
杰克从同事马克身上得到了教训，之后每天提早十五分钟上班。
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