grade

Compared meaning: a rank, amount, or extent of something (noun).

比较义项：等级、程度、水平（名词）。

• grade 本词

  Grade emphasizes a formal classification of quality or performance, often on a labeled scale (A, B, C) used for school marks or product quality; less common for a general amount of something.

  grade 强调按质量或表现进行的正式分类，常用于有标签的等级（如 A、B、C），比如学校成绩或产品质量；较少用来表示笼统的“程度”。

  The eggs are sorted into grades based on their size and quality.

  这些鸡蛋按大小和质量被分成不同的等级。

• degree

  Degree highlights the extent or amount to which something is true, often in phrases like 'to a degree' or 'a degree of difficulty'; it is abstract and continuous rather than a fixed category.

  degree 强调某种性质达到的程度或分量，常见于“to a degree”“a degree of difficulty”等说法；它是抽象且连续的，而不是固定的类别。

  Success depends to a large degree on how much effort you put in.

  成功在很大程度上取决于你付出了多少努力。

• level

  Level refers to a specific point or standard on a scale or hierarchy, such as skill or achievement level; it is the most general term and often replaces grade or degree loosely.

  level 指在某个尺度或层级体系中所处的具体位置或标准，例如技能水平或成就水平；它是三者中最通用的词，常可笼统地替代 grade 或 degree。

  Her fitness level improved dramatically after months of consistent training.

  经过几个月的持续训练，她的体能水平明显提高了。

Grade, degree, and level can all express a kind of rank or amount. Grade means a formal classification of quality, like a school mark. Degree means how much of a quality exists. Level, the most general term, means a point on a scale.

这三个词都可表示某种“程度”或“等级”，容易被中国学习者混用，但用法和搭配不同：grade 强调按质量或表现分类的正式等级；degree 强调某种性质达到的程度或分量；level 强调在某个尺度上所处的具体位置或标准。这里不比较 degree 的“学位”或温度单位含义，也不比较 grade 的“坡度”含义，或 level 作形容词表示“平的”的用法。

Compared meaning: a class or year-level in school (noun).

比较义项：年级／班级（名词）。

• grade 本词

  Refers to a year-level in school (a stage a student is in, e.g. fifth grade), used mainly in American English; focuses on the student's level, not the classmates.

  指学校里的一个年级（学生所处的阶段，例如五年级），主要用于美式英语；强调学生所在的年级阶段，而不是同学群体。

  My daughter is starting third grade at a new school this fall.

  我女儿这个秋天要在一所新学校上三年级。

• class

  Refers to a group of students who study or are taught together, often in one room; focuses on the group of people, not the year-level, and can also mean a single lesson period.

  指一起学习或被一起授课的一群学生，通常在同一间教室里；强调的是这群人本身，而不是年级阶段，也可以指一节课。

  Our class voted on where to go for the school trip.

  我们班投票决定了校外教学要去哪里。

Grade and class both describe a school group organized by age or level. Grade focuses on a student's year-level, used mainly in American English. Class focuses on the group of students who study together, and can also mean one lesson.

grade 和 class 在“学校中按年龄或程度划分的教学单位”这个意思上很接近，学习者容易混用，但 grade 强调的是学生所处的年级／年龄阶段，class 强调的是一起上课的那群学生（班级群体）。grade 还有“分数、成绩等级”的意思，class 还有“阶级；课；种类”等意思，这里都不比较。