Also,in Darwin's time, the age of the Earth was estimated only in the millions of years too short a time some said for evolution to work.

VOA: special.2009.12.01

It disappears and comes back, and at that time his mother, who is actually Freud's daughter, was going out to work for the first time on some days, and the boy was getting used to letting her go.

它又消失了之后又出现了，在那时他的妈妈，实际上是弗洛伊德的女儿，正准备,第一次出去工作一段时间，男孩正慢慢习惯,让她出去。

耶鲁公开课 - 1945年后的美国小说课程节选

"It took us a long time to get here. It is going to take some time for us to work through this.

VOA: standard.2009.04.05

According to Sahin, scientists have known for some time that conventional explanations for how parts of the brain work need to be revised.

VOA: standard.2010.01.15