routine

Compared meaning: usual, not special, part of daily life (adjective).

比较义项：形容某人或某事平常、不特别、属于日常状态（形容词）。

• everyday

  Everyday describes something that happens or is used daily as a normal part of life; it is used only before a noun, never after a linking verb, and does not compare quality or ability.

  everyday 表示某事每天发生或被经常使用，是日常生活中很平常的一部分；它通常只放在名词前面作定语，不能放在系动词后面作表语，也不涉及优劣的比较。

  Cooking dinner is just part of my everyday routine now.

  做饭现在只是我日常生活的一部分。

• ordinary

  Ordinary stresses the absence of anything special or different, often contrasting directly with something exceptional; unlike the others, it can follow a linking verb, as in 'the day was ordinary.'

  ordinary 强调没有任何特别或与众不同之处，常与“特别”或“特殊”相对照；与其他几个词不同，它可以放在系动词后面作表语，比如说某一天“很平常”。

  It was just an ordinary day at the office, nothing special.

  那只是办公室里普普通通的一天，没什么特别的。

• average

  Average judges someone or something against others or a norm, usually implying medium ability or quality rather than mere frequency or routine; it can sound mildly unflattering about a person.

  average 是把某人或某事与其他人或某个标准相比较，通常表示中等水平的能力或质量，而不仅仅是发生的频率或例行程度；用来形容人时，语气可能略带贬义。

  The average student spends two hours on homework each night.

  普通学生每晚花两个小时做作业。

• routine 本词

  Routine describes an activity carried out regularly as a required or expected part of a job or process, focusing on procedure rather than daily frequency; it can suggest the task is dull.

  routine 形容某项活动是工作或流程中按规定、有规律进行的一部分，强调的是程序而非单纯的每天发生；有时还暗示这项工作枯燥乏味。

  Checking passenger passports is a routine procedure for airport staff.

  检查乘客护照是机场工作人员的例行程序。

Everyday, ordinary, average, and routine all mean usual. Everyday means happening daily; it goes only before a noun. Ordinary means nothing special, and can follow a linking verb. Average compares something with others, often meaning only medium. Routine means a regular part of work.

这四个词都能形容“平常、不特别”的人或事，但侧重点不同：everyday 强调天天发生、习以为常；ordinary 强调没有任何特别或与众不同之处；average 强调与大多数人或大多数情况相比处于中等水平；routine 强调是工作或流程中按规定、有规律进行的一部分。这里不比较 average 表示“数学上计算出的平均值”的用法，也不比较 routine 作名词表示“常规、惯例”的用法。