This paper introduces a rhumb algorithm for calculating the minimum-time ship route.

介绍一种恒向线算法计算船舶最短时间航线。

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And this text introduces the calculating method of the converse light route.

介绍了逆向光路的计算方法。

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At last, from the reflection imaging theory and the calculating method of the converse light route, this test deduces the easy way to measure thin convex lens's optics parameter.

最后，通过薄凸透镜的反射成象原理和逆向光路的计算，推导出测量薄凸透镜的光学参量的简便方法。

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They are believed to use the position of the sun as a reference point and can compensate for its movement across the sky when calculating the route they need to return home.

BBC: Bee brains help to make robots smarter