他们已经学习了一些很难的新词汇：温度计、湿度、龙卷风和暴风雪。

They have been learning some difficult new vocabulary like thermometer, humidity, tornado and blizzard.

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记录式或非记录式的液体比重计及类似的浮子式仪器、温度计、高温计、气压计、湿度计、干湿球湿度计及其组合装置。

Hydrometers and similar floating instruments, thermometers and pyrometers, barometers, hygrometers and psychrometers, recording or not, and any combination of these instruments.

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可利用称为温度计小工具检查湿度水平，并把它维持在尽可能低的水平——不超过50%。

Get a small tool called a hygrometer to check humidity levels and keep them as low as you can-no higher than 50%.

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