To achieve a sharper picture and limit the eye strain that can affect 3-D viewers, some filmmakers are experimenting with higher speeds.

为了获得更鲜明的图像，减少观看3-D电影时对眼睛的压力，有些拍摄者开始尝试更快的放映速度。

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The sliding surface of rock or soil block usually appears three-dimensional feature, so, the 2-D limit equilibrium method is not good to analyze the block stability.

岩体与土体失稳的滑裂面形状大多具有三维特征，用二维极限平衡理论难以得到与实际相应的分析结果。

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Markey (D-Mass.) and Joe Barton (R-Tex.) said last week they are working on a bill to limit the collection of personal information about teens and prevent targeted marketing to them.

Markey (D - Mass .)和Joe Barton (r - Tex .)上周说，他们正忙于一项关于限制商业行为收集青少年个人信息的法案，同时也包括阻止市场将青少年作为商业营销目标。

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The current tolerable upper limit of vitamin D intake is 50 mcg (2, 000 IU) per day.

CNN: How much vitamin D should someone over 55 take?

Jim Webb, D-Virginia, that would limit how often U.S. troops could be deployed in Iraq and Afghanistan.

CNN: Reid to GOP: Join push to change course in Iraq

Mr Giscard d'Estaing, for example, wants to introduce a limit of two consecutive quinquennats.

ECONOMIST: France