The index is the government's chief gauge of future economic activity.

这个指数是政府对未来经济活动的主要判断标准。

《柯林斯英汉双解大词典》

Bound to two atoms of oxygen, it creates carbon dioxide, the chief greenhouse gas that has kept our planet warm for billions of years - and is now, thanks to human activity, making us too warm.

碳原子和两个氧原子相结合组成了二氧化碳，是数十亿年来保持我们地球温度的重要温室气体。但是近些年来由于人类的活动，地球温度不断上升，导致温度过高。

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The chief audit executive should develop and maintain a quality assurance and improvement program that covers all aspects of the internal audit activity and continuously monitors its effectiveness.

审计执行主管应制定并坚持开展质量保证与改进项目，该项目应涵盖内部审计活动的方方面面并不断监督内部审计活动的效果。

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"It's simply unacceptable that the overwhelming majority of our young women are leaving school with dangerously low levels of physical activity, " said WSFF chief executive Sue Tibbals.

BBC: Health

Mehmet Ali Isikara, chief of the Kandilli Observatory, warned of "unusual" seismic activity near Istanbul.

CNN: Aftershock raises fears as Turkey quake toll reaches 7,000

Adam Hewison, president and chief strategist with INO and MarketClub.com, said the recent activity of the market making a high on Aug. 23, then breaking, making a new high on Tuesday, then breaking, should make investors cautious.

FORBES: FOCUS: Gold Nearing Important Technical Chart Support Levels