形容词
中文翻译：无灰尘的
同义词：
['clean', 'dust-free']
例句：
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1.The room was dustless after the cleaning.
打扫后房间是无尘的。
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2. The new machine is dustless, which saves a lot of time.
这台新机器是无尘的，节省了很多时间。
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3. To keep the room clean and dustless, we need to regularly vacuum.
为了保持房间干净无尘，我们需要定期吸尘。