名词
中文翻译：实用范围
同义词：
['practical scope', 'practical range']
例句：
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1.The engineer designed the project to have a practical range of 50 miles.
工程师设计这个项目的实际射程为50英里。
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2. The new weapon has a practical range of over 100 kilometers.
新型武器的实际射程超过100公里。
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3. The company's product is expected to have a practical range of at least 10 years.
该公司的产品预计至少具有10年的实际使用寿命。