auxiliary

Compared meaning: not the main one; secondary or supporting (adjective).

比较义项：不是主要的，次要或辅助（形容词）。

• secondary

  Emphasizes rank of importance - something that matters less than a main thing, not necessarily providing help or support.

  强调重要性的等级——不如主要的事物重要，不一定表示提供帮助或支持。

  For most students, math is the primary subject and art is only secondary.

  对大多数学生来说，数学是主科，而艺术只是次要科目。

• auxiliary 本词

  Emphasizes function - extra help, support, or backup for a main system or group, often implying reserve capacity rather than importance ranking.

  强调功能——为主系统或主要人员提供额外的帮助、支持或备用力量，强调的是储备作用而非重要性排名。

  The generator provides auxiliary power when the main electricity supply fails.

  发电机在主电源出故障时提供辅助电力。

Secondary and auxiliary both mean not the main thing, but they focus differently. Secondary stresses rank: something below the main thing in importance. Auxiliary stresses function: extra help or backup for a system, not about rank. Not compared: secondary school, auxiliary (helping verb).

这两个词都可表示“不是主要的”，但侧重不同：secondary 强调重要性上排在第二位、次于主要事物；auxiliary 强调功能上提供额外的帮助或备用支持，不一定涉及重要性排名。这里不比较 secondary 的“中学的”（如 secondary school）以及 auxiliary 作名词表示“助动词”的用法。

Compared meaning: a person who helps someone with their work (noun).

比较义项：助手（名词）。

• aide

  Aide names one specific person who personally assists someone in an important role, often as a long-term or official personal assistant.

  aide 指专门协助某位重要人物的具体某个人，通常是长期或正式的私人助理。

  The senator's aide answered phone calls and scheduled every meeting for her.

  这位参议员的助手负责接听电话，并为她安排所有的会议。

• auxiliary 本词

  Auxiliary usually refers to extra support staff brought in temporarily, often used collectively with words like staff or nurse rather than for one named person.

  auxiliary 通常指临时增派的辅助人员，多与 staff、nurse 等词搭配集体使用，而不是特指某一个人。

  The hospital brought in auxiliary staff during the busy flu season.

  在流感高峰季节，医院增派了辅助人员。

Aide and auxiliary both mean a helper, but differently. Aide names one specific person who helps someone important, often as a long-term assistant. Auxiliary usually means extra support staff brought in temporarily, not one named person. Not compared: auxiliary meaning helping or extra.

这两个词在“助手”这一义项上都指协助他人工作的人，但用法有别：aide 通常指专门协助某位重要人物的具体某个人，多为长期或正式的私人助理；auxiliary 则多指临时增派的辅助人员，常以集体或搭配形式出现（如 auxiliary staff）。这里不比较 auxiliary 作形容词表示“辅助的”的用法（如 auxiliary verb）。