Supplementary materials refer to the substances used to increase the nitrogen content in the cultivation medium, such as rice bran, wheat bran, various cake fertilizers, livestock manure, soybean flour, corn flour and so on.
We live in comparison, where there is darkness, where there is light, where there is hate, where there is love, where there is bad, where there is good, where there are things done by others and others, we know who we are.
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