two-stage

英 ['tuːst'eɪdʒ] 　　美 ['tuːst'eɪdʒ] 　　

两级

two-stage的用法和样例：

He was my senior at Yale by two years.
他是耶鲁大学比我高两级的学生。
There are two steps up onto the bus.
上公共汽车有两级踏板。
The project took place during the teacher's in-school probationary teaching period, and had two stages.
研究共分二阶段进行。
In some cases, a two-stage severe hydrotreater using Ni-Mo and precious metal catalysts in the first and the second stage respectively can be used.
有时更得采用二阶段制程，前后段分别使用镍钼和贵金属触媒。

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