"The number of young adults that have finished high school is also now at a record all-time high.

VOA: special.2009.11.19

Taq stands for thermos aquaticus, it's a marine micro-organism that lives near these hydrothermal events in the bottom of the sea and they live under very high temperatures and pressures all the time.

aq是"水生栖热菌"的简称,那是一种生活在靠近深海热液活动区的,海底微生物,它们长期生活在高温高压的环境中

耶鲁公开课 - 生物医学工程探索课程节选

College enrollment has reached an all-time high in the United States.

VOA: special.2009.11.19

That means they're college eligible. So part of the reason college enrollments are at an all-time high is because the pool of youth that's eligible to go to college is also at an all-time high."

VOA: special.2009.11.19

But with the price of gold at an all time high, things are changing.

VOA: standard.2009.10.17

"The numbers of children vaccinated today are at an all time high.

VOA: standard.2009.12.28