例句
The boat has an auxiliary engine for emergencies.
这艘船装有一台应急用的备用发动机。
Hospitals require auxiliary power systems to maintain essential medical services during unexpected electricity failures.
医院需要备用供电系统，以便在意外停电时维持必要的医疗服务。
常用搭配
- auxiliary power｜备用电力
- auxiliary engine｜备用发动机
- auxiliary verb｜助动词
用法提示
语法中 auxiliary verb 指助动词，如 be、have、do。