正如学校化学课中展示的那样，金属镁化学性质非常活泼，储存着大量能量。
As school chemistry lessons show, metallic magnesium is highly reactive and stores a lot of energy.
学校是糟糕的产业，无论是公立还是私立，通常这都不是因为糟糕的管理，而是由于这一行业本身的性质使然。
Schools are bad businesses, whether public or private. not usually because of bad management but because of the nature of the business.
在美国和加拿大，运筹学方面的课程在各种学校、学院和院系中被广泛设置，反映出这个领域高度融合的性质。
University programs in operations research in the United States and Canada are located in a wide variety of colleges, schools, and departments, reflecting the field's highly interdisciplinary nature.
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