“four-level laser”的概念、定义、翻译、参考文献-科学参考

单词	four-level laser
释义	four-level laser [¦fȯr ¦lev·ǝl `lā·zǝr] ^PHYSICS A laser in which the lowest level for a laser transition is an excited state rather than the ground level.
随便看	countdown counter counterbalance counterbalanced truck counterbalance system counterblow hammer counterbore counter circuit counter coupling countercurrent countercurrent cascade countercurrent distribution countercurrent extraction countercurrent flow countercurrent leaching countercurrent separation countercurrent spray dryer counter dead time counter decade counterelectromotive cell counterelectromotive force counterfire counterfloor counterflow counterfort

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