His parents were concerned. "To say the least, they didn't like it very much."

VOA: standard.2010.04.20

Two is it gives you some sense for how concerned parents were about the risks of polio in the community and how much they wanted a vaccine to be developed, such that they gave permission for their children to enter into this trial.

第二是,它能让你了解,父母们对孩子,罹患小儿麻痹症的风险的关心程度,以及对疫苗的渴望程度,这使得他们同意让他们的孩子,参与到这种实验中

耶鲁公开课 - 生物医学工程探索课程节选

So, it was something that parents before 1950 were very concerned about.

所以,在一九五零年之前,脊髓灰质炎是父母们十分担心的一种疾病

耶鲁公开课 - 生物医学工程探索课程节选

She adds that, since a lifetime of obesity may put a child at greater risk for heart disease and other health problems, parents need to be concerned about their child's weight from the very start.

VOA: standard.2010.03.09