常見例句雙語例句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.最好還是繼續(xù)兩級方案，即通過和不通過，或者（若堅(jiān)持精英主義）再為頂尖者增加“優(yōu)秀通過”這個額外的級別。It is shown that this approach can not only treat the two-level system within the rotating wave approximation(RWA), but also present an exact solution of the JC model without RWA.本文的結(jié)果表明：這種方法不僅能夠處理在旋轉(zhuǎn)波近似下的二能級體系，也可以用來精確求解無旋轉(zhuǎn)波近似時的JC模型。The stimulated photon echo in degenerate two-level system has been studied.研究了簡并二能級系統(tǒng)的受激光子回波效應(yīng)。 返回 two-level system