complex product structure 复杂产品结构
Saponins have all sorts of physiological activity and become one of hotspots in natural product research. But its complex structure results in the difficulties in its separation.
皂苷具多种生理活性，为目前天然产物研究热点之一，但其结构复杂导致分离工作难度增大，因而也成为研究的难点之一。
Using ammonium carbonate to produce complex fertilizer is one of ways to adjust product structure for small size ammonia plant.
把碳铵加工成复肥，是小氮肥厂调整产品结构的一种选择。
The geological structure influenced the Sichuan red strata. the weathering product and weathering strip's formation are analyzed. The red strata is a complex mechanics medium.
对四川红层的特征进行了研究，分析了地质构造对四川红层形成的影响以及四川红层的风化物和风化分带的形成。
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