在过去的几个月里，他的物理知识飞速增长。

His knowledge of physics has grown ___by ___leaps ___and ___bounds over the past few months.

由于新政策，经济正在飞速扩张。

The economy is expanding ___in ___leaps ___and ___bounds due to new policies.

凭借她的 dedication，她的技能正在飞速提高。

With her dedication, her skills are improving ___by ___leaps ___and ___bounds.