It shows an assessment of reading proficiency levels in fourth grade.

这项研究对,四年级同学的阅读熟练程度。

麻省理工公开课 - 媒体、教育、市场课程节选

3% of black school children in fourth grade are left behind proficiency levels.

做了评估，其中，在四年级的黑人孩子里,63%阅读能力较差，58%的西班牙孩子。

麻省理工公开课 - 媒体、教育、市场课程节选

They're of an incredibly impressive technical proficiency and they are absolutely soaked with the references to the classical writers that Milton had been ingesting from his earliest youth.

体现了弥尔顿精湛的写作技术,他总能引经据典,参考之前从那些古代作家,那里学到的东西。

耶鲁公开课 - 弥尔顿课程节选