He tried to improve a poor, undeveloped area in east Baltimore.

VOA: special.2011.01.30

And that for centuries thereafter, different rhapsodes repeated it but elucidated it, illuminated it, extended it, changed it, tried to improve it, sometimes they added stuff.

在这之后的几个世纪里,不同的史诗吟诵者重复着,讲解着,阐释着 拓展着,变化着,尝试改进着,有时还添油加醋

耶鲁公开课 - 古希腊历史简介课程节选

So they changed policies and tried another way to improve agriculture.

VOA: special.2010.03.23

Sarah tried different products to improve her hair but nothing worked.

VOA: special.2010.03.28

that 'we tried initially, during the first three years of Gorbachev's tenure, to improve the system accelerate it but keep it intact.

VOA: standard.2009.11.03