Specially, the thermal lens effect is intensified due to the long tail attached to pulse, which leads to decreasing of conversion efficiency if pulse repetition rate is enhanced.
特别由于脉冲附带长的拖尾加剧了热透镜效应，使得脉冲重复频率的增加引起转换效率的降低。
Dual working fluid parallel-compound cycle engine is a relatively new type of thermal engine which is characterized by a high efficiency and enhanced specific power.
双工质平行-复合循环热机是一种较新的热机，它能达到高效率和高比功。
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