All the materials used were of the highest grade.

使用的材料全是优质品。

《牛津词典》

The highest grade was AAA and that was the best grade you could get.

最高等级是 AAA 级，那是你可获得的最好等级了。

youdao

We always got the highest marks in math in our grade with his teaching.

在他的教导下，我们的数学成绩总是全年级最高分。

youdao

La Platosa produces the highest-grade of silver in Mexico, according to their website.

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All three receive Morningstar's highest rating of "gold" or its second-highest "silver" grade.

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Dry aging is so important that it supplants USDA grades: dry aged choice beef tastes much better than the highest grade, prime, un-aged.

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