Eclipses bring truth to the surface - keep a watchful eye.

日食带真相浮出水面-保持警觉的眼睛。

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Even today the Gitga'at and Kitasoo/Xai'xais people keep a watchful eye on their bears during hunting season.

即使到了今天，吉特盖特人和科塔索赛赛（Kitasoo/Xai'xais）人到了狩猎季节还在留心他们的精灵不被盗猎。

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From that booth the men could watch the crowd at the pool tables and keep a watchful eye on Alexi near the cash register, and Nicolo drawing beers behind the bar.

从那个隔间可以看到台球桌旁那群人，同时还能盯着收银台附近的亚历克西和正在吧台后倒啤酒的尼科洛。

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People with type 1, or juvenile,diabetes must keep a watchful eye on their blood glucose levels because their pancreases are not working normally.

VOA: standard.2010.04.15

Risk managers, investors, and regulators should keep a watchful eye on these apparently safe, simple, transparent, and useful derivatives.

FORBES: UBS' $2B Man, Kweku Adoboli, And The Perils Of ETFs

All this means that frequent travellers need to keep a watchful eye on how much they are actually moving when they are travelling.

BBC: Overweight frequent flyers

Also keep a watchful eye on the Middle East.

FORBES: The Fed's Delicate Dance