He died long before the search for Planet X resulted in the discovery of Pluto.

VOA: special.2010.07.11

Should we sort before we search?

好的，让我们一起看看？

麻省理工公开课 - 计算机科学及编程导论课程节选

But her search was not easy. "I started in August before my senior year.

VOA: special.2010.06.11

"And,they have no alternatives before them. This makes them especially vulnerable to exploitation and violence as they search for food and shelter.

VOA: standard.2009.10.04