Their work could give infected mothers in the developing world a new way to prevent the spread of the AIDS virus to their newborn babies.

VOA: special.2010.05.24

And the reason that they're the least sheilded is because they can get closest to the nucleus, so we can think of them as not getting blocked by a bunch of other electron, because there's some probability that they can actually work their way all the way in to the nucleus.

它们最不容易被屏蔽的原因,是因为他们可以更加接近原子，所以我们可以认为它们,最不容易被其它原子阻挡住，因为它们有一定的概率,离原子核非常近。

麻省理工公开课 - 化学原理课程节选

The protesters plan to work their way north in vehicle convoys, gradually adding to their numbers as they move through cities and towns in the coming days.

VOA: standard.2009.03.12

So far this month, U.S.officials have sent around to other Mexican border cities with the hope that many of them will not work their way back to Juarez and become part of the city's criminal underground.

VOA: standard.2010.04.01