下面是一些常见的表达，注意几个关键词——plate, license, registration：

He rubbed the dirt off the number plate with his sleeve. 他用袖子擦掉车牌上的泥。

Someone managed to get down the registration number of the car. 有人记下了车牌号

Can you read a car number-plate at fifty metres? 你能在离汽车五十米远处看清车牌号码吗?

Did anyone see the car’s license plate? 有人看清那辆汽车的车牌吗？

I’m glad she had the presence of mind to take down the car’s registration number. 我很高兴她能镇定地记下车牌号码。

On vehicle licence plates in the UK, the numbers are preceded by a single letter. 英国汽车车牌的数字前面有一个英文字母。

The witness had copied down the license plate number of the taxi the suspect used to get away. 证人记下了嫌犯逃跑时乘坐的出租车的车牌号。

The guard jotted down the van’s license plate number. 门卫匆匆下了货车的车牌号。