From the newborn, the babies and infants to the school-age child, the disease incidence rate and the case fatality rate assume the tendency which drops gradually.
从新生儿、婴幼儿到学龄儿童，发病率及病死率都呈逐渐下降的趋势。
With continues gas field development, formation pressure drops gradually, fluid intrusion and water lock effect are particularly prominent in gas well shutdown process.
随着气田的开发和天然气的不断采出，地层压力逐渐降低，生产气井在关井过程中的积液倒灌和水锁效应问题显得尤为突出。
With continues gas field development, formation pressure drops gradually, fluid intrusion and water lock effect are particularly prominent in gas well shutdown process.
随着气田的开发和天然气的不断采出，地层压力逐渐降低，生产气井在关井过程中的积液倒灌和水锁效应问题显得尤为突出。
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