effectualness

The effectualness of the new policy was clear from the drop in complaints.

新政策的有效性从投诉减少中可以明显看出。

用法提示：这里 effectualness 是名词，意为“有效性”，作主语。

Researchers measured the effectualness of the treatment over a six-month period.

研究人员在六个月内衡量了该疗法的效力。

用法提示：effectualness 是名词，作动词 measured 的宾语，指效力。

Critics questioned the effectualness of the training program after the results were published.

结果公布后，批评者质疑该培训项目的有效性。

用法提示：effectualness 是名词，作动词 questioned 的宾语。