学生们掌握了小数、百分数和分数。

The students had a grasp of decimals, percentages and fractions.

《柯林斯英汉双解大词典》

分数被划分为三个档次：优，良和及格。良代表扎实的学术能力，而及格表示掌握部分知识。

Scores are translated into three levels: advanced, proficient and basic. Proficient represents solid academic performance, while basic shows partial mastery of skills.

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你可以告诉你的孩子糟糕的分数四号不会影响他们的人生，如果他们确实学会掌握了有价值的技能 并愿意为世界大部分人服务。

You can inform your kids that bad grades won’t hurt them at all in life, if they actually learn to master valuable skills and put them on offer to the world at large.

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