Where the rubber meets the road is the point of contact between automobile tires and the road.

接触地面的地方就是汽车和地面的接触点（point of contact）。

At the time, she was searching for a way to make a material strong enough to use on automobile tires.

当时，她正在寻找种制造强度足以用于汽车的材料的方法。

" I feed a whole dam kitchen full of niggers to follow around after him, but if I want an automobile tire changed, I have to do it myself" .

“我养活了整个水， 里面全是黑鬼跟着他， 但如果我想换汽车， 我必须自己动手” 。