Yes, but Heyerdahl spent ages studying the cloud movements, ocean currents and wind patterns to find if it was actually possible.

没错，不过Heyerdahl花了好多年的时间研究云层运动、洋流和风的模式来探究这种理论究竟可不可行。

These cloud movements in turn published the work of the winds, giving them a visible body, and enabling us to trace them.

这些云的运动反过来又公布了风的作用，给了它们一个可见的实体，并使我们能够追踪它们。

With continuously changing hard to predict weather, you must get lucky with a clear sky or find a tour company that can really understand the cloud movement and find the breaks.

由于天气不断变化且难以预测，您必须幸运地遇到晴朗的天空，或者找到一家能够真正了解云层运动并找到休息时间的旅游公司。