Over the years, he has worked with farmers and seed companies and developed more than eighty seed types for Africa.

VOA: special.2009.07.07

The mediocre person answers only 30% of the questions correctly admits that he has only average grades he worked on the yearbook as a proofreader and he tried out for the track team but didn't make it.

后者回答正确30%的问题,坦白学习成绩一般,给年刊做校对,尝试参加校田径运动队，但没成功。

耶鲁公开课 - 心理学导论课程节选

He has worked to make known the unlawful agreements behind a huge Chinese mining project.

VOA: special.2009.04.27

He has worked on projects with singers,dancers and artists.

VOA: special.2010.07.12

has strongly called for disarmament and he has worked to restart the stalled Middle East peace process since taking office nearly 10 months ago.

VOA: standard.2009.10.09

He has faced economic problems and worked to strengthen relations with other countries.

VOA: special.2009.05.02

He says this has worked in Bolivia, which has a huge population of yacare,a species of crocodile.

VOA: standard.2010.01.31