It is used as soft boundary to melt the route, it becomes their emotional journey.

它被用作软边界来使路线柔和，变成了他们的情感旅程。

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If you follow the boundary between two colors, you'll notice that some lines appear to be very hard and rigid, while other lines are soft and fuzzy.

如果你细看两种颜色间的边界，你就会注意到有些线似乎非常刚硬而刻板，而另一些线则柔软而模糊。

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Firstly, based on simplified dynamics of lunar soft landing, an explicit guidance law was induced by solving the special two-point boundary value problem.

首先，基于简化的软着陆动力学模型，通过求解特殊两点边值问题，给出了一种实时显式制导方法。

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