《天工开物·上篇·作咸》
第二天早上，地下湿气和露气都很重，灰下已经结满了盐茅。等到雾散天晴，过了中午就可以将灰和盐一起扫起来，拿去淋洗和煎炼。
明晨露气冲腾，则其下盐茅勃发，日中晴霁，灰、盐一并扫起淋煎。
The next morning, the underground moisture and dew are very heavy, and the salt reed is already covered with ash. When the fog dissipates and the weather is fine, after noon, the ash and salt can be swept up together, taken away to be washed and refined.
<s>[INST] Kindly elucidate the central themes in this passage in English: 明晨露气冲腾，则其下盐茅勃发，日中晴霁，灰、盐一并扫起淋煎。 [/INST] The next morning, the underground moisture and dew are very heavy, and the salt reed is already covered with ash. When the fog dissipates and the weather is fine, after noon, the ash and salt can be swept up together, taken away to be washed and refined.</s>
Kindly elucidate the central themes in this passage in English: 明晨露气冲腾，则其下盐茅勃发，日中晴霁，灰、盐一并扫起淋煎。
user
The next morning, the underground moisture and dew are very heavy, and the salt reed is already covered with ash. When the fog dissipates and the weather is fine, after noon, the ash and salt can be swept up together, taken away to be washed and refined.
assistant