But if this oil gets on there, everything we got invested, we just going to go down."

VOA: standard.2010.05.04

if you've got a hill or valley and there's a cart on wheels it's going to go down to the bottom.

如果我们有一座山或者山谷，并且,有一个有轮子的车，这辆车会自动滑到底部。

麻省理工公开课 - 热力学与动力学课程节选

But if I see you through the glass, the object is going on some trajectory, which has got both up and down and horizontal motion.

但是如果我透过窗户看到你,这个物体沿着某个轨迹运动,既有上下,也有水平方向的运动

耶鲁公开课 - 基础物理课程节选

As the criminal investigation got underway, there were many more questions than answers regarding the attempt to bring down an Amsterdam to Detroit airliner on Christmas Day.

VOA: standard.2009.12.27

You got to be good at writing down the forces acting on a body.

你得擅长列出物体上的作用力

耶鲁公开课 - 基础物理课程节选