The Raman interaction of a pair of two-level atoms with the radiation field is studied.

研究了两个双能级原子与单模辐射腔场的喇曼相互作用。

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The cavity field spectrum of a pair of two level atoms coupled by dipole dipole force in a ideal cavity with two mode radiation field is studied.

研究了存在偶极相互作用的两等同原子与双模腔场共振相互作用双光子过程的腔场谱。

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He has had the pair of skates for two years.

这双滑冰鞋他买了二年了。

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The global reach of the Marley tribute CD includes a pair of Canadian vocalists, two groups from Hawaii, and the veteran string band from the northeastern U.S.

VOA: standard.2010.07.22

A covalent bond is any time we have a pair of electrons that is shared between two different atoms.

所谓共价键就是我们有两个原子,共用一对电子。

麻省理工公开课 - 化学原理课程节选

So in oxygen we have a similar situation where, in fact, we are not going to promote any of the electrons because we have two lone pair electrons no matter what we do.

在氧中，情况很类似，我们不能激发电子,因为无论如何我们都有两个孤对电子。

麻省理工公开课 - 化学原理课程节选

He has thrown a pair of two-hitters, the last on Aug. 6, 2010 at Florida.

NPR: Cardinals Beat Rockies 3-0 On Wainwright Gem

Harris gave up a pair of two-run homers and took the loss as a New York Mets split squad beat St.

WSJ: Navy man Harris struggles on mound in Cards debut

New York's best scoring threat came in the second when the Yankees loaded the bases on a pair of two-out infield singles sandwiched around a walk.

WSJ: Yankees cooled off by Indians, Masterson 1-0