名词
中文翻译：有效尺寸
同义词：
['effectiveness', 'efficiency']
例句：
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1.The new design has a more effective size for the user.
新设计对用户来说有更好的使用效果。
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2. The company's new product is designed with an effective size for easy storage.
该公司的新产品设计了便于存储的有效尺寸。
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3. The engineer calculated the effective size of the machine to ensure it could handle the load efficiently.
工程师计算了机器的有效尺寸，以确保它能够高效地处理负载。