This ceremony is held in the depth of winter. But, by the words we speak and the faces we show the world, we force the spring.

这个仪式虽在隆冬举行，然而，我们通过自己的言语和向世界展示的面容、却促使春回大地。

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This ceremony is held in the depth of winter. But, by the words we speak and the faces we show the world, we force the spring.

尽管这个仪式在隆冬举行，但是，我们所说的话，我们向全世界所显示的面貌，将促使春天的早日来临。

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So we generate a torque which is proportional to the Angle, very similar to the linear spring whereby we generate a force which is proportional to the linear displacement.

所以产生一个力矩，和这个角成比例，就像线性弹簧，中产生的力矩和，线位移成比例。

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First, we got to make sure the spring exerts a fixed force every time.

首先,要保证,弹簧每次产生的力是恒定的

耶鲁公开课 - 基础物理课程节选

We don't know what the force of the spring is.

我们不知道弹簧的力多大

耶鲁公开课 - 基础物理课程节选

We did the comparison with the elephant or something; a is the second derivative of x and for this problem, when F is due to a spring, we know the force is that by studying the spring.

我们也已经把它与大象或其它东西作过比较,a 是 x 的二阶导数,在这个问题中,F 是由弹簧产生的,我们在讨论弹簧问题时已经知道了力的大小

耶鲁公开课 - 基础物理课程节选

Prime Minister GORDON BROWN (United Kingdom): Subject, of course, to conditions on the ground, we plan from next spring to reduce force numbers in Southern Iraq to a figure of two and a half thousand.

NPR: U.K. to Bring More Troops Home