| 1. | Changes in the gain could occur if the length of the maser changed because of turbulent gas motions .
气体的湍流运动使微波激射区的长度改变时，增益就可能发生改变。 |
| 2. | At low temperatures, the difference in population of atoms between two energy levels, which is the basis of maser action, is greater .
在低温下，作为微波激射作用基础的两个能级之间原子数的差别较大。 |
| 3. | the region is otherwise undistinguished at optical and radio wavelengths, but it does contain a number of oh and maser sources.
此区在光学和射电波段是不著名的，但却包含有许多OH和微波激射源。 |
| 4. | During the early nineteen-fifties a remarkable device known as the maser came into being through the efforts of a number of scientists .
在本世纪五十年代初，通过许多科学家的努力，出现了一种引人注目的器件，叫做微波激射器。 |
| 5. | The most likely and obvious radiative connection between the infrared and the masers is through the mechanism of radiative pumping of the maser .
红外辐射及微波激射间最可能而又明显的辐射联系是通过微波激射的辐射抽运机制实现的。 |
| 6. | Atomic hydrogen maser
氢原子微波激射器 |
| 7. | < uk > the region is otherwise undistinguished at optical and radio wavelengths , but it does contain a number of oh and maser sources . < / uk >
< uk >此区在光学和射电波段是不著名的，但却包含有许多oh和微波激射源。 < / uk > |
| 8. | " for fundamental work in the field of quantum electronics , which has led to the construction of oscillators and amplifiers based on the maser - laser principle
在量子电子学领域的基础研究成果，为微波激射器激光器的发明奠定理论基础 |
| 9. | This led to the first amplification and generation of electromagnetic waves by stimulated emission in early 1954 . they called this device a maser ( microwave amplification by stimulated emission of radiation )
光来放大媒质的仪器，并于一九五四年成功研制成第一台微波激射放大器，称为maser （ microwaveamplificationbysimulatedemissionofradiation ） 。 |
