形容词
中文翻译：无接触的
同义词：
['contact-free', 'non-contact']
例句：
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1. The new technology makes it possible for people to communicate without touching each other.
这项新技术使得人们无需触碰就能进行交流。
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2. The contactless payment system has become increasingly popular in recent years.
近年来，无接触支付系统越来越受欢迎。
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3. The scientists developed a contactless sensor that can detect the presence of objects without physical contact.
科学家们开发了一种无接触传感器，可以检测物体的存在而无需物理接触。