“通常情况下，除了超晶格活跃区域，量子级联激光器设计只有一个高能态，”论文第一作者藤田一惠（Kazuue Fujita）在电子邮件采访中告诉PhysOrg.com。

“Usually, quantum cascade laser designs have only one upper state, except for superlattice active region, ” Kazuue Fujita, the lead author on the paper, tells PhysOrg.com in an email interview.

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他注意到一幢新楼正在惠特克公园附近拔地而起。

He noticed a new building going up near Whitaker Park.

《柯林斯英汉双解大词典》

惠特尔工作真正价值可能在于它将又一人类官能——听觉与宇宙奇迹联系起来。

The true value of Whittle's work may be that it connects one more human sense—hearing—to the wonders of the cosmos.

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