For example, it is commonly said that luck, good or bad, comes in threes; if an accident happens, two more of the same kind may be expected soon afterwards.
例如，人们常说，好运和坏运气都是三位一体的；如果发生一起事故，不久之后可能会发生两起同样的事故。
We know that two vehicles are going to come along and not help Tony and that the third vehicle will, because everything, as I say, happens in threes in folklore.
我们知道有两辆车会过来，而且它不会帮助托尼，那么第三辆就一定会，因为，我说过，在民间传说中什么都只发生三次。
The importance of two courses, i. e. plant safety assessment and planning and product safety design, is specially emphasized, so as to secure the implementation of " threes…"
强调了工厂安全评价与规划、产品安全设计两门课程的重要性，以保证安全卫生“三同时”制度的实施，并讨论了培养安全工程人才的各种模式。
The importance of two courses, i. e. plant safety assessment and planning and product safety design, is specially emphasized, so as to secure the implementation of " threes…"
强调了工厂安全评价与规划、产品安全设计两门课程的重要性，以保证安全卫生“三同时”制度的实施，并讨论了培养安全工程人才的各种模式。
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