Application of ion exchange technology in the purification, epimerization analysis and detection of sugar was introduced.阐述了离子交换技术在糖的纯化 、 差向异构化及分析检测方面的应用....
限制饮食和放松身心是保持健康的两个要诀。Diet and relaxation are two important keys to good health.住房条件差、家庭压力大会影响身心两方面的健康。Poor housing and family stress can affect both physical and mental health.长途飞行后，你可能会感到身心疲惫。You may be physically and me...