Being insulators, the elements of a photonic crystal constrain this propagation, permitting some wavelengths to pass while denying passage to others, which are thus reflected.

光子晶体的成分做为绝缘体就约束着两者间的运动——允许某些波长通过，而与此同时阻止其它的波长，这样就产生反射效果。

youdao

In 1824 Smith belonged to the party that rediscovered the South Pass, a passage to the Northwest through Wyoming.

在1824年史密斯参加了南方路线的重新探险，并再次打开了从西北到怀俄明的路线。

youdao

During autumn nights, thousands of birds pass directly above the megalopolis, a passage generally unnoticed by its human inhabitants.

在秋季的夜晚，成千上万的鸟从这座大都市的上空径直飞过，而人类居民通常却浑然不知。

youdao

With that provisional compromise now dead, the takeover deal will have to pass through the U.K. Competition Commission to win passage, a lengthy process with an uncertain outcome.

FORBES: The Twisted Logic of Murdoch's Pivot on BSkyB Deal

While I am thrilled the budget assumes the passage of major health care reform this year, we still need to actually pass a health care reform bill for it to happen.

CNN: Commentary: I'm just a bill on Capitol Hill

Administration officials are confident the measure will pass the House, but say they are still short of the public commitments necessary to guarantee passage.

CNN: Key Democrat announces support for trade pact