In the first match, England's Frank Lampard would have tied the score at 2-all before half-time, but officials did not see his shot bounceacross the goal line and rebound out after hitting under the crossbar.

VOA: standard.2010.06.29

It has a half-life of approximately three years at which time it stops decaying.

它生命的一半是三年,在三年的时候，它就停止衰亡。

麻省理工公开课 - 固态化学导论课程节选