"To counter terrorism, and I'm talking about terrorism writ large,extremism, requires more than just your special mission unit forces.

VOA: standard.2009.09.23

He just said whenever there's an acceleration, it's going to be due to some forces and it's your job to find what the forces are.

他只说过只要有加速度,就说明有力的作用,你们的任务是要找出这些力

耶鲁公开课 - 基础物理课程节选

It's all about market forces and the health and the condition of your product.

所有这一切都取决于市场的需求,以及你的产品的状况和健康情况

耶鲁公开课 - 美国内战与重建课程节选

I don't want to be an alarmist here." "But the one thing that is very important is that as the ISAF (NATO) forces operate in the areas near the Pakistan border, that the impact on Pakistan be taken into account at all times and that the Pakistani security forces are properly aware of what the military actions are so they can do what is necessary to protect your border,"

VOA: standard.2009.07.04

Do not forget the existing forces and do not make up your own forces.

不要忘记已存在的力,不要自己乱加力

耶鲁公开课 - 基础物理课程节选

Your problem is to only look at the forces of contact on you, and that is just this f.

你只需要注意那些直接作用在这个物体上的力,那就只有 f 了

耶鲁公开课 - 基础物理课程节选

But then you can trace it to some external forces, which are carrying your iPod.

过一会儿你就能发现一些外力的作用,也就是有人把你的 iPod 拿走了

耶鲁公开课 - 基础物理课程节选