Although compositions of approximately 25 percent of organic compounds are known, the majority still does not have clear chemical structures or processes, and their control means and technologies are not fully understood as well.
about 25% of the organic matter are known to the specific chemical composition,
Most of the chemical structure and the process remains unclear,
control approaches and technologies are also unclear?
detailed compositions of only about 25% of organiic materials
have been found. however, structures of most of them are still kept unknown and so does their synthesis processes, control methods and control techniques.
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