许多欧洲国家和日本的生育率已经下降到人口置换率以下，这让人们担心，劳动力短缺和生产力下降将威胁生活质量。
Fertility rates in many European nations and Japan have dropped below the replacement rate, causing concern that shortages of labor and productivity could threaten the quality of life.
目的评价国产米力农对二尖瓣置换术后低心排患者血液动力学改变的临床效果。
Objective To evaluate the hemodynamic effects of milrinone in patients after mitral valve replacement.
以厦门市某工业园项目实际工程为背景，对试验区夯沉量、地表隆起及动力触探检测结果进行分析，得出强夯置换法处理工程软弱地基达到了预期的加固效果。
Taking the actual project as an example, based on the sinks of the tamped area, the apophysis and the dynamic penetration result, this technique can achieve the anticipated reinforcement effect.
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