four level
网络释义
four-level laser [激光] 四能级激光器 ; 四能阶雷射
four-level solid laser [激光] 四能级固体激光器
four-level laser rod 四能级激光棒
four-level emitter 四能级放射体 ; 四透镜变焦系统
four level laser 四能级激光器
four-level fluoresent solid 四能级荧光固体
four-level laser system 四能级系统
four-level fluoresent crystal 四能级荧光晶体 ; 四能级放射体
双语例句原声例句权威例句
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A model of the photon avalanche in a four level coupled system is proposed.
提出了四能级耦合系统的光子雪崩上转换模型。
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Conversely, chemical engineers straight out of school can easily make almost four times the wages of an entry-level high-school graduate.
相反，刚从大学毕业的化学工程师的工资几乎是入门级高中毕业生的四倍。
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In fact, real benefit levels were lower in the 1970s than they were in the 1940s, and in most states the maximum benefit was below the poverty level for a family of four.
事实上，20世纪70年代的实际福利水平比20世纪40年代的要低，而且在大多数州，四口之家的最高福利都低于贫困线。
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It ends at the Dead Sea, the lowest point on Earth, four hundred meters below the level of the Mediterranean Sea.
VOA: special.2009.05.18
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So at this point in the story-- at this level in the story, if you will, I've touched one, two, three, four numbers total or I've made two comparisons.
那么这时，我总共已经动过了1，2，3，4个数字,或者说我做了两次比较。
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One, two, three, four, so on each level of the picture I'm drawing, I've seem only to be looking at each number once.
，2，3，4，可见，在我画的,这幅图的每一层上，对每个数字,都只会用到一次。
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