To the moving observer on the train, the circle of light expanded equally on all sides.
对于火车上的观察员来说，光圈是匀速向各方面扩展的。
By maneuvering equivalent, the multiple stationary observers bearings-only system is transformed into a special single moving observer problem.
通过运动等效，将多静止站系统转化成一个特殊的单运动测向站问题。
By maneuvering equivalent, the multiple stationary observers bearings-only system is transformed into a special single moving observer problem.
通过运动等效，将多静止站系统转化成一个特殊的单运动测向站问题。
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