环状过氧化物作为一类具有生物活性的天然产物的结构单位，其合成方法的研究对于这类天然产物的合成具有重要的指导作用。
Synthetic studies on cyclic peroxide which constitutes active structure unit in some natural substances are of great importance to the total synthesis.
组成蛋白质的基本单位是氨基酸，氨基酸是构建生物机体的众多生物活性大分子之一，是构建细胞、修复组织的基础材料。
The basic unit are composed of protein amino acids. As one of the many bioactive macromolecules of the body, amino acids are building cells, the basic materials for repair organizations.
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