这些波浪，内波，可能会有几万米长，持续几个小时。

These waves, internal waves, can be tens of kilometers long and can last several hours.

youdao

这礼拜我确实已经出去滑了两次雪，每次里程3万米。

I mean, I did get out for two sessions of skate-skiing this week already, about 30 kilometers each.

youdao

从太阳方面看，磁能迫使通量绳上升到地表数万米之上。

In the sun's case, magnetic energy forces a flux rope tens of thousands of kilometers upward from the surface.

youdao