two stage cycle 两级循环
two-stage compression cycle 双级压缩循环
two-stage compression refrigeratrion cycle 双级压缩制冷循环
For a brief moment during that stage of its life cycle, the tongue consists of two tiny half-tubes before merging into one.
在它生命周期的这一阶段，有短暂的一刻，其舌头由两个微小的半管组成，随后融合为一体。
This paper investigates the present stage of economic cycle of China from two aspects.
本文从两个层次考察当前中国经济周期的阶段。
However, this stage of his life cycle was extremely short, lasting only two standard days.
然而，他生命周期的这一阶段极短，只有两个标准日。
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