我右手臂上有一小块深褐色的疤痕,每次看到它,我就会想起那件往事,它时刻提醒我要注意安全。那是几年前的一个夏天,我们在老师的带领下去工厂参观。进入工厂大门,领我们参观的工程师发给我们人手一件工作服,要求我们穿戴好后才能入内。 There was a small dark brown scar in my right arm, and every time I saw it, I was reminded of that past event, which reminded me of safety. That is a summer a few years ago, we went to the factory under the leadership of the teacher to visit. Into the factory gate, lead us to visit the engineer sent us a staff uniform, asked us to wear well before they can enter.