以下为句子列表：
英文: Abstract ：The luminous efficien is the key parameter of electric light sources energy2saving performance.
中文: 摘要:光效是电光源节能性能的关键参数。
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英文: Anti-infrared extinction coefficient is a key parameter to assess the obscuring performance of smoke-screen, a method to calculate the viriation of radiant energy and obtain the extinction coefficient based on the temperature tested by a thermal imager ha
中文: 摘要红外消光系数是衡量烟幕对红外遮蔽能力的关键参数，文中提出利用热像仪测得的温度数据，通过计算得到红外辐射能量变化及消光系数的方法，介绍应用情况及测试中应注意的问题。
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英文: As a key parameter of multi-purpose reservoir operation, flood limit water level plays a critical role in achieving the balance between flood control and economic benefit such as hydropower generation and navigation improvement etc.
中文: 汛限水位是综合利用水库运行和调度的重要参数之一，它影响着防洪效益和防洪风险。
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英文: The formulation reflects the relation between the key parameter and the vortex loss, on the basis of which the measure of reducing vortex loss is carried out.
中文: 该公式直接反映出关键参数与涡流损失的关系，据此提出了减少涡流损失的措施。
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