velocity

火箭以极快的速度垂直升入天空。

The rocket ascended vertically at an incredible ___velocity.

物理老师解释了如何计算物体的速度。

The physics teacher explained how to calculate an object's ___velocity.

随着假期临近，购物的速度明显加快了。

The ___velocity of shopping increased noticeably as the holidays approached.