1. （通常指醫(yī)務(wù)或軍隊中的）輔助人員
    An auxiliary is a person who is employed to assist other people in their work. Auxiliaries are often medical workers or members of the armed forces.

    e.g. Nursing auxiliaries provide basic care, but are not qualified nurses.
           助理護士只提供基本護理，不具備護士資格。

2. （員工、軍隊）輔助的，協(xié)助的
    Auxiliary staff and troops assist other staff and troops.

    e.g. The government's first concern was to augment the army and auxiliary forces.
           政府關(guān)心的首要問題是擴充軍隊及輔助隊伍。

3. 備用的；后備的
    Auxiliary equipment is extra equipment that is available for use when necessary.

    e.g. ...an auxiliary motor.
           備用發(fā)動機
    e.g. ...auxiliary fuel tanks.
           備用油箱

4. 附屬機構(gòu)
    An auxiliary is an organization that is connected with, but less important than, another organization; for example, an organization for the wives of the members of the main organization.

    e.g. The restaurant is operated by the Palo Alto Auxiliary for the benefit of the Lucile Salter Packard Children's Hospital.
           這家餐廳由帕洛阿爾托附院經(jīng)營，收益用來資助露西爾·帕卡德兒童醫(yī)院。

5. （語法中的）助動詞
    In grammar, an auxiliary or auxiliary verb is a verb which is used with a main verb, for example to form different tenses or to make the verb passive. In English, the basic auxiliary verbs are 'be', 'have', and 'do'. Modal verbs such as 'can' and 'will' are also sometimes called auxiliaries.