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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Keep a watchful eye: Although you don't need to sit with your children while they do their homework, it helps to be nearby.

时刻要有警惕性：虽然刚孩子在做功课的时候，你不需要和他们坐在一起，但是如果可以和他们学习的地方靠近一点，也会有帮助的。

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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

One of the great protections for a freedom-loving people is government transparency the ability of citizens to keep a watchful eye on their elected representatives.

FORBES: Big Brother Is Increasingly Watching You