他的跑步速度很快。

Tā de pǎobù sùdù hěn kuài.

His running speed is very fast.

这城市经济发展速度很快。

Zhè chéngshì jīngjì fāzhǎn sùdù hěn kuài.

The city's economy is developing rapidly.

这辆车的速度太快了。

Zhè liàng chē de sùdù tài kuài le.

The speed of this car is too fast.