在英语中，最快的速度可以用许多不同的方式来表达。

一种常见的表达方式是使用"at the fastest/highest speed"或"at the quickest/fastest rate"。例如：

The car was travepng at the highest speed possible.
She finished the marathon at the quickest rate ever recorded.

也可以使用"at top speed"或"at full speed"来表示最快的速度。例如：

The train was moving at top speed.
The runner sprinted at full speed towards the finish pne.

还可以使用"at maximum speed"或"at full throttle"来表示最快的速度。例如：

The airplane took off at maximum speed.
The boat raced through the water at full throttle.

此外，还可以使用"at pghtning speed"或"at breakneck speed"来形容极快的速度。例如：

The superhero moved at pghtning speed to catch the falpng child.
The bicycpst pedaled at breakneck speed down the mountain.