• 1. Convert efficiency: 转换效率
• 2. pump convert efficiency: 泵浦转换效率

• 1.As an ideal energy carrier, Hydrogen has advantages of high energy density, high convert efficiency and cleanness.
  氢是一种十分理想的载能体，它具有能量密度高，热转化效率高，清洁无污染等优点。
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• 2.The term "efficiency" refers to the ability of a speaker system to convert electrical energy (power from the amplifier) into acoustic output.
  术语“效率”是指扬声器系统将电能（功放的推力）转化为声音输出的能力。
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• 3.Grey scale processing is to convert the colorful image to grey scale one, in order to reduce storage space and raise operation efficiency.
  图像灰度化即是将真彩色的车辆图像转变成灰度图像，目的是减少其电脑存储空间和提高运算效率。
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