The additional upper state is created by a first quantum well adjacent to the injection barrier.

新增高能态是通过注入式势垒旁第一个量子阱来创建的。

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Electrons are injected into the higher upper state via resonant tunneling from the previous injector.

电子通过之前注入器的谐振隧道注入到更高的能态。

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When the upper state population is not reversed, the channel with greater ratio of emission and absorption cross-section has greater competitive advantage.

当上能级粒子数处于未反转分布态时，具有较大的发射截面与吸收截面比值的波长信道拥有相对较大的增益竞争优势。

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Texas Gov. Rick Perry, lagging behind in the polls, began a slew of events in the state Tuesday, holding three in the upper part of the state, as his opponents continued to press the flesh in New Hampshire.

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