Some students work for a year or two in a medical or research job before they attempt to enter medical school.

VOA: special.2009.06.02

But before he can enter the city and meet Gilgamesh he has to be tamed.

但是在入城之前，他必须变得驯服。

耶鲁公开课 - 旧约导论课程节选

Officials at the center examined many of the immigrants who arrived by ship before they were permitted to enter the United States.

VOA: special.2009.06.29

"We'll need to wait for all the girls to enter puberty before we have a good grasp on what the contribution is of those environmental chemicals."

VOA: special.2010.08.18

The violence began just before midday Saturday when a group of heavily armed militants in army uniforms tried to enter the Pakistani military headquarters.

VOA: standard.2009.10.11

The two young women died in hospital from injuries suffered when they got caught up in the crush of people trying to enter a stadium hours before the pope held a youth rally.

VOA: standard.2009.03.22