求翻译：在现代社会，危险几乎到处都存在。例如，上一年在我们学校，我其中的一个校友在上体育课玩耍时，从单杠上摔了下来。他的左腿受了伤，所以他很长时间都没来上学。这告诉我们，无论在什么地方都要注意安全。那么，怎样在学校保持安全哪？是什么意思？

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In the modern society, the danger nearly everywhere all exists.For example, the last year in our school, an I alumnus plays when on physical education, from the high bar has fallen down.His left leg was injured, therefore his very long time all has not come to go to school.This tells us, regardless

In modern society, risks exist almost everywhere. For example, in our school last year, when one of my Alumni playing in the gym class, fell down from the horizontal bar. His left leg was injured, so he didn't come to school for a long time. This tells us that no matter where you want to pay attenti

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