The rate equations for a continuous four level laser are solved in this letter, taking into account the finite lower level lifetime and the crystal field splitting of the laser levels.

在考虑了有限的下能级寿命和激光能级与晶格场的相互作用的基础上，对四能级激光的速率方程组进行了求解。

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By shining laser light onto hydrogen or antihydrogen and observing which wavelengths are absorbed, the energy levels of the two can be compared in detail.

用激光照射氢原子或反氢原子，观察何种波长的光线被吸收了，可以通过这种办法来详细地比较这两种原子的能级。

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The new laser method is different because it uses natural humidity levels and atmospheric conditions to create water droplets.

而新的激光技术就不同了，因为它是利用自然的湿度和大气的条件来制造水滴的。

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The FAA attributes the massive increase in incidents to laser pointers being more widely available online, stronger power levels, and an increase in green lasers which are easier to see, as well as better reporting of the incidents by pilots.

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By shining laser light onto hydrogen or antihydrogen and observing which wavelengths are absorbed, the energy levels of the two can be compared in detail.

ECONOMIST: Antimatter: Gotcha! | The