He would try to explain it this way when students asked for a top grade just for studying hard in chemistry class: What if a baseball player came to spring training and worked harder than all the others, but still could not play well.

VOA: special.2009.03.12

And three will mean you did a really good job that will be top grade.

三分是最高分,说明你做的非常好

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

(Sound) Amid loud acclamations of approval, top hardline Iranian cleric, Hojatoleslam Ahmad Khatami warned the West that Tehran will produce its own high-grade uranium for a medical research reactor, if the UN International Atomic Energy Agency refuses to provide the fuel.

VOA: standard.2009.11.28