Keeping close track of the market's highs and lows.

密切关注市场的高低点。

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You should keep close track of your weight with regards to the amount of calories that you're eating.

你应该密切按照摄取食物的卡路里量留意你的体重。

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Man overcame these faults by learning to track his targets at a close range.

人类通过学习近距离追踪目标，克服了这些缺点。

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CNN.com will be keeping close track of the entire voyage, offering insights each week on the Plastiki's progress.

CNN: Boat of plastic to set sail with environmental message

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

He also keeps loved ones close: The track "Heroes" is a tribute to his family.

CNN: 'Idol' champ eyes long-term success