You know, I am still not too clear about the hydrologic cycle, the transfer of water back and forth between the earth and the atmosphere.

你知道，我仍然不是很清楚水文循环，也就是水在地球和大气之间的来回转移。

youdao

It USES a special "card" system to display open apps and features, allowing a user to cycle through them easily and switch back and forth between apps.

它采用的是一种特别的卡片式系统来显示打开的应用程序和图标，这允许我们在应用程序间方便的进行查看和转换。

youdao

This pattern can be extended to state flags that can change back and forth, but only if it is acceptable for a transition cycle (from false to true to false) to go undetected.

这种模式可以扩展到来回转换的状态标志，但是只有在转换周期不被察觉的情况下才能扩展(从false到true，再转换到false)。

youdao

And so it goes, cycle after cycle, as conditions swing back and forth from one extreme to the other.

FORBES: Long-Term Forecasts Are Mostly Worthless