Income investors were left to ponder Eurotunnel, the operator of the rail link between France and Britain, which will pay the first dividend since its creation in 1986.
靠收益生活投资者现在只好去考虑英国和法国海底隧道的经营者欧洲隧道公司，因为该公司自1986年创立以来首次开始发放股利。
Therefore interaction Hamitonian of the single mode light field with the medium is proportional to the fourth power of the annihilation operator plus creation operator.
因此，单模光场与此介质相互作用的哈密顿量正比于光场的湮灭算符与产生算符和的四次方。
The wave function and probability density are obtained by the creation and annihilation operators of the invariant operator.
通过不变量算子的产生和湮灭算符，得到波函数和几率密度。
The wave function and probability density are obtained by the creation and annihilation operators of the invariant operator.
通过不变量算子的产生和湮灭算符，得到波函数和几率密度。
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