These happen because in extremely dense crowds there is so much shoving and jostling that people's movements are no longer entirely under their own control.

因为在极其密集的人群里，有很多人推搡和拥挤，人们自身的行动并不受自己的控制，因此会发生混乱。

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Some icons of wall street love to advance the cause of market predicting , because they are paid to predict these movements.

一些华尔街偶像喜欢进行市场预测，因为他们预测市场动向能获取收入。

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Consumers should not expect that these devices will be able to distinguish between sleep stages because these devices rely on movements, whereas sleep stages are defined primarily by brain activity.

消费者并不应该指望这些睡眠监测设备能准确的区分睡眠阶段，因为睡眠监测设备检测的是运动，而睡眠阶段则是靠脑活动区分的。

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Because manufacturing is a relatively small part of the economy, the movements of these indicators often differ from those reflecting other sectors.

CNN: The Business-Cycle Peak of March 2001