two level system 二能级系统
a two-level system 双能级系统
quantum two-level system 二能级量子系统
nonlinear two-level system 非线性两能级系统
degenerate two-level system 简并二能级系统
two-level energy system 二能级系统
Single Mode Two-Level System 单模二能级系统
two level system decision making 二层系统决策
inhomogeneously broadened two-level system 非均匀展宽二能级体系
Much better to stick with a two-level system of pass and fail, or (if you will insist on such elitism) one extra level of “pass with distinction” for the top quartile.
最好还是继续两级方案，即通过和不通过，或者（若坚持精英主义）再为顶尖者增加“优秀通过”这个额外的级别。
The stimulated photon echo in degenerate two-level system has been studied.
研究了简并二能级系统的受激光子回波效应。
We have studied the saturation effect of degenerate four-wave mixing in Doppler-broadened two-level system.
我们研究了多普勒增宽的二能级系统中，简并四波混频的饱和效应。
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