就用这两个长度的线段作立方体的棱，能做多少个不同的立方体？

Using just these 2 lengths as the edges of the cuboids how many different ones can you make?

youdao

所以，这两个序列的LCS长度是5。

So, the length of an LCS for these two sequences is 5.

youdao

在一年里这两个时间点上，太阳出现在赤道的正上方，并且在地球上绝大多数地方，白天与夜间的长度是相同的。

At these times of the year, the sun appears to be directly over Earth's equator, and the lengths of the day and the night are equal over most of the planet.

youdao