For years,people have wondered whether they are safe from germs when they travel in small,enclosed areas.

VOA: special.2009.07.14

Now shortly after Milton composed the sonnet "How soon hath Time," he wrote a letter to a friend in which he enclosed this poem, the sonnet.

在他创作“时间过得真快“后不久“,他给朋友写了封信，把这首十四行诗也附了进去。

耶鲁公开课 - 弥尔顿课程节选

It's contagious, that is, it's transferred to other persons or objects, depending on how receptive they are--perhaps by physical touch, perhaps in the case of severe impurity by sharing an enclosed space, by being together under an overhanging roof, tent.

它会传染给另一个人，另一个物体，这取决于它们的接受度，也许是通过肢体接触，也许是因为呆在一个与世隔绝的空间里，同在一个屋檐下。

耶鲁公开课 - 旧约导论课程节选

Stay in an enclosed area when mosquitoes are most active.

VOA: special.2009.05.26

The capture of the Maersk Alabama made news around the world after the pirates let the ship and its 20 crew members go, but took the ship's captain hostage in an enclosed lifeboat.

VOA: standard.2009.04.22