auxiliary

柯林斯词典

1. ADJ Auxiliary equipment is extra equipment that is available for use when necessary. 备用的[ADJ n]
...an auxiliary motor. …一台备用的发动机。
2. ADJ Auxiliary staff and troops assist other staff and troops. 后备的[ADJ n]
The government's first concern was to augment the army and auxiliary forces. 政府首要关注的是扩充军队与后备军。
3. N-COUNT 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. 助手
Nursing auxiliaries provide basic care, but are not qualified nurses. 助理护士们提供基本护理，但没有护士资格。
4. N-COUNT In grammar, an auxiliary or auxiliary verb is a verb that 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. 助动词