4) asymptotically NQD sequence
渐近两两NQD
5) two years and two days
两年零两天
6) two state approximation
两态近似
1.
Using the two state approximation of the time dependent porturbation theory,the formu-las of the transition probability,the state state reaction cross section and rasection rate for resor-nant vibration vibration energy transfer between molecules in a electric field have been derived.
用含时微扰理论两态近似法处理分子间振动能传递，导出了电场中分子间共振Ｖ—Ｖ传能的跃迁几率、态—态反应截面与反应速度常数表达式。
补充资料：近年
1.指过去不远的数年。 2.临近新年。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条