You should always keep to the speed limit.

什么时候你都不得超过最高速度限制。

He was driving at well over the speed limit.

他当时开车的速度远远超过了限制。

The road has a 30 mph speed limit.

这条公路限定时速30英里。

You've got to keep to the speed limit.

你必须遵守限速的规定。

The speed limit on the freeway is 55mph.

这条高速公路的限速为每小时55英里。