名词
中文翻译：失去的效用
同义词：
['uselessness', 'inefficiency']
例句：
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1. The company's decision to cut its workforce has led to a loss of usefulness for the department.
公司决定裁员导致该部门失去了效用。
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2. The old car is no longer useful for driving, but it still has some value as a collector's item.
这辆旧车已经不适合驾驶了，但作为收藏品仍有一些价值。
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3. The new policy has resulted in a loss of usefulness for many businesses.
新政策给许多企业带来了无用之处。