"We start off by asking them to complete a national three-hour long educational program.

VOA: special.2011.07.29

What's hanging off of the side of this long molecule that's formed by polymerizing nucleotides are - is this base unit.

在这条由多聚核苷酸,构成的长链分子,一侧悬挂着碱基单位

耶鲁公开课 - 生物医学工程探索课程节选

I was going to say when you first start doing this, even people who have been doing it for a long time still go off on ten-minute daydreams before realizing that their minds were wondering.

我本想说第一次尝试时，但即便是修行多年的人,也会走神十分钟之久,方才意识到自己刚做了白日梦。

普林斯顿公开课 - 人性课程节选

But Long,who set an Olympic long jump record during qualifying, gave Owens advice on how to improve his take-off.

VOA: standard.2009.08.19

The 90,000 seat Soccer City is to host the opening and final matches of the month-long World Cup which kicks off on June 11.

VOA: standard.2010.01.22