Do bear in mind, though, that at this time of year the weather is very changeable and if the cloud suddenly descends, it's all too easy to wander off the track.

但是要记住，每年的这个时候天气变化无常，如果乌云突然降落，就很容易偏离轨道。

youdao

Unfortunately, cloud computing's track record to date has hardly been flawless.

不幸的是，云计算在跟踪记录的实时性方面总是存在问题。

youdao

And they are held back by difficulties in keeping track of data and getting reliable information about what's going on across a cloud.

于是他们面临着这样的难题——如何记录数据并获取云运行情况的可靠信息。

youdao

They can scan Earth's atmosphere every 15 minutes in 12 different wavelengths, to track cloud development.

MSN: Satellite's first photo of Earth is an impressive one

CIOs and CTOs should keep their eye on the evolution toward maturity of the public cloud and keep close track of the costs of the private cloud so that rational decisions can be made about where to provision specific types of applications and functionality.

FORBES: How CIOs and CTOs should Improve their Businesses with the Private Cloud

Hilliard's Beer in Seattle, founded in October 2011, bought software from the German company SAP that allows it to use cloud computing to track sales and inventory and to produce the reports that federal regulators require.

NPR: Practically Human: Can Smart Machines Do Your Job?