Bleeding of cesarean section is usually due to uterus atone, placental factors, prolonged labor and lacerated section.
剖宫产出血的主要原因是宫缩乏力、胎盘因素、产程延长及切口撕裂等。
The fast-food chain has refused to sign labor contracts or insure employees against workplace injuries, and prolonged their probationary periods.
该快餐连锁拒绝签订劳动合同、缴纳工伤保险，并且延长了试用期。
Because of the simple operation and no requirements for a large quantity of manpower, materials, and labor, the service life of the hose is prolonged.
由于上述操作简单，不必投入大量人力、物力和大量的劳动，延长了胶管的使用寿命。
Because of the simple operation and no requirements for a large quantity of manpower, materials, and labor, the service life of the hose is prolonged.
由于上述操作简单，不必投入大量人力、物力和大量的劳动，延长了胶管的使用寿命。
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