形容词
中文翻译：有辅助作用的
同义词：
['auxiliary', 'supplementary']
例句：
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1.The teacher's notes were instrumental in helping me understand the material.
老师的笔记在帮助我理解材料方面起了辅助作用。
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2.The research team found that the new technology was instrumental in improving efficiency.
研究小组发现，新技术在提高效率方面起到了辅助作用。
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3.The GPS system is instrumental in locating lost items.
GPS系统在定位丢失物品方面起到了辅助作用。