A speed limit of 30 mph was introduced in built-up areas.

在建筑物密集区域，限速为每小时30英里。

《柯林斯英汉双解大词典》

Sensors and active controls are used to detect the onset of dangerous vibrations, which also limit the forward speed of a helicopter.

传感器和“主动控制”被用于侦测危险震颤的先兆迹象，而这种危险震颤也会限制直升机的前飞速度。

youdao

That's shocking, because much of modern physics relies on Einstein's theory that the speed of light is the universe's speed limit.

那是十分令人震惊的，因为许多物理学家总是根据爱因斯坦的相对论，认为光速是宇宙速度的极限。

youdao

Among them: enactment of a national speed limit of 65 miles per hour, freight industry participation in an Environmental Protection Agency program to reduce fuel consumption, and a reduction of highway congestion by raising the fuel tax if necessary.

FORBES: Magazine Article

Most notably, it found that drivers in just about every state stay within the speed limit on average, with only Mississippi edging 0.1 miles per hour over the top speed limit of 70 MPH.

ENGADGET: TomTom data finds drivers aren't speeding much, are being watched

Thousands of vehicles were recorded by volunteers and police in areas with a speed limit of up to 40mph.

BBC: Devon and Cornwall Speed Watch: Drop in speeding drivers