Studies have shown that consuming moderate amounts of coffee (about 3 to 4 cups a day) may improve mood and concentration, and reduce the risk of type 2 diabetes and several types of cancer.
研究表明，喝适量的咖啡（每天3到4杯）可以使心情舒畅，精力更集中，并会减少患2型糖尿病和多种癌症的机率。
The coupling condition of different lipid ratio, glutaraldehyde concentration and types of liposomes was probed.
探索了不同比例的脂、不同戊二醛浓度和不同类型脂质体的偶联情况。
The particles morphology of polystyrene was much related to the types of solvent and concentration of monomer .
聚苯乙烯的粒子形态与溶剂种类和单体浓度有很大关系。
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