The superficial epithelia cells do not bind the active ingredient and thus only serve as a transit area.

浅表的上皮细胞并不与活性药物成分结合，因而只是运输区。

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It said that its economic situation as a landlocked country and the use of its territory as a transit area by drug traffickers justify its inclusion in ATPA.

巴拉圭认为，自己是内陆国家，且常被贩毒者利用作为毒品中转地，这些经济情况表明巴拉圭得到ATPA的优惠是合理的。

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I often thought, how could I give up my car in a city with minimal mass transit and an area that encompasses 131 square miles?

我常常想，我怎么能够在一个拥有最少公共交通和拥有131平方英里的城市放弃使用汽车呢？

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Washington's public transit operator, the Metropolitan Area Transit Authority, increased the number of uniformed officers patrolling the system, said Metro spokeswoman Lisa Farbstein.

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He called it the deadliest crash in the history of the Washington Metropolitan Area Transit Authority, known as Metro.

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The Washington Metropolitan Area Transit Authority said it would restore limited rail service.

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