The high collecting strength and good selectivity of T-2K is explained using the theory of hard soft acid base and the theory of frontier molecular orbit.

用硬软酸碱理论和前线轨道理论解释了T -2K的高捕收能力和强选择性。

youdao

I think that these countries are somewhat trying to manage this oil risk but they can't yet get onto the frontier.

我想这些国家或多或少,都试着控制石油风险,但他们根本无法达到有效边界。

耶鲁公开课 - 金融市场课程节选

If Frederick Jackson Turner had anything right in "The Frontier Thesis", although he didn't pay hardly any attention to the South, this idea of a safety valve of a West to move to was surely there for slavery.

如果弗雷德里克·杰克逊·特纳,在《边境论》中有什么正确的言论,那就是,尽管他对南方几乎没有施以任何关注,即这个西进运动是一道安全阀的构想,显然是为奴隶制而设的

耶鲁公开课 - 美国内战与重建课程节选

Space isn't the only frontier Mr. Branson is exploring.

WSJ: The Weekend Interview with Richard Branson: Space��The Next Business Frontier

Holly countersued, claiming Frontier hadn't been straight about its potential for legal liabilities.

FORBES: Magazine Article

The British-drawn boundary between the two countries is disputed by Afghanistan, which doesn't recognize as an international frontier the so-called Durand Line that cuts through the ethnic Pashtun heartland.

WSJ: Afghan, Pakistani Forces Clash