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照相和电影的发明,不仅在我們的文化娛乐和日常生活中增添了很丰富的內容,同时也給科学研究工作提供了許多新的方法。把要研究的事件拍成照片或电影,便可以事后反复地进行观察和測量。在科学研究的很多問題中,有些过程进行得十分迅速或非常短暫,不能用眼睛直接观察。譬如說生物学家想看一看昆虫在飞行时,它的翅膀到底是怎样搧动的;工程师想研究一下高速內燃机活塞运行的詳細过程是怎样的;体育专家想看一下运动員短跑、跳栏、击劍等动
The invention of photography and film not only adds rich content to our culture, entertainment and daily life, but also provides many new methods for scientific research. Taking photos or movies of the events to be studied can be observed and measured repeatedly afterwards. Of the many problems in scientific research, some processes are very rapid or very short-lived and cannot be observed directly with the eyes. For example, biologists want to see how the wings of insects fly when they fly; engineers want to study what the detailed process of high-speed internal combustion engine pistons is like; sports experts want to look at athletes’ sprints and jumps. , fencing and other activities