These technologies will help us become better stewards of the environment - and they will help us to confront the serious challenge of global climate change.

这些技术将帮助我们成为环境的更好的管理者——它们还将帮助我们应付全球气候变化的严峻挑战。

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But the mobile communication environment regarding the traditional QAM modulation is the serious challenge, but in teaches in the character mobile communication system also to have USES QAM.

但是移动通信的环境对于传统的QAM调制是严重的挑战，不过在教字移动通信系统中也有使用QAM的。

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All of this technological progress creates a more flexible work environment and contributes to a healthy work-life balance, but it poses a serious challenge to IT professionals, who face a new set of threats to data and network security.

FORBES: Securing Corporate Data In An Increasingly Mobile World