①

I accelerated to overtake the bus.

我加速超过公交车。

②

The car sped up to 100 mph.

汽车加速到每小时100英里。

③

He stepped on the gas and accelerated rapidly to pass a car.

他加大油门，加速超过了一辆汽车。

④

The car can accelerate to 60 miles per hour in just 6 seconds.

这辆车可以在6秒内加速到每小时60英里。

Next one.

下一个词。

I like this word.

是我喜欢的一个词。

Accelerate. 

加速。

It's not only used for driving.

这个词不仅在开车的时候用到。

What accelerate means is to go faster.

accelerate的意思就是开快点。

So if you are going on the highway, you will be accelerating. 

所以你要是在高速上行驶，你就要加速。

You will need to go faster. 

你要开得更快。

Speed.

超速。

First, if you are speeding, it means you're going too fast. 

如果你超速的话，就说明你开得太快了。

So I was speeding means I was going too fast. 

所以如果说我超速了，就意味着我开得太快了。

"Speed up" is the same as accelerate.

Speed up这个短语和accelerate意思一样。

I sped up.

我加速了

You have to speed up. You have to accelerate.

你得加快速度。