By your estimation, how many more years before we will see Afghan National Army and the police force in enough numbers to stablize the country?

根据您的估计，还要多少年,才能有足够的阿富汗国民士兵和警察,来维持这个国家的安定？

普林斯顿公开课 - 国际座谈会课程节选

The best work on this has been done by Elissa Newport and Sam Supalla who have studied people who have been in the United States for many, many years like 30, 40 years and seeing how well they have come to speak English.

在这方面最佳的研究,是由伊莉萨·纽波特,和萨姆·苏普拉所进行的,他们研究了在美国生活了,三四十年以上的人们,探究了这些人们讲英语的流利程度

耶鲁公开课 - 心理学导论课程节选