HSK 6
湿度
shīdù名
humidity level
今天空气湿度比较大。
Jīn tiān kōng qì shī dù bǐ jiào dà.
The humidity is relatively high today.
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Hold the button, say it, then let go.
Other HSK words sharing a character
Also free:
New in the HSK 3.0 word list at level 6.