名词
中文翻译：湿度指示器
同义词：
['humidity gauge', 'humidity meter', 'moisture indicator']
例句：
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1. Theroom is too dry; we need a humidity indicator to measure the air moisture level.
房间太干燥了，我们需要一个湿度指示器来测量空气湿度水平。
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2. To ensure proper ventilation, it's essential to have a humidity indicator installed in every classroom.
为了确保适当的通风，每个教室都需要安装湿度指示器。
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3. The manufacturer recommends using a humidity indicator to monitor the indoor humidity levels during the winter months.
制造商推荐在冬季使用湿度指示器来监测室内湿度水平。