expeditiousness

The expeditiousness of the emergency response saved many lives.

用法提示：此处 expeditiousness 为名词，意为‘快速；迅速’，作主语。

We admired the expeditiousness with which the team completed the project.

用法提示：expeditiousness 作为介词 with 的宾语，表示‘迅速’这一属性。

For a bureaucracy known for delays, their expeditiousness was remarkable.

用法提示：expeditiousness 作主语补足语，强调机构的‘快速’特点。