当然，一棵苹果树能存活多久是由许多因素决定的。
Of course, a number of factors will dictate how long an apple tree can survive.
在沙地环境中，沙埋是影响植物幼苗存活的一个重要因素。
Sand burial is one of the main factors that affect seedling survival in sand land.
结论胎龄是影响NEC发生率和存活率的重要因素。
Conclusion Gestational age is the major factor affecting the incidence and survival rate of NEC.
结论胎龄是影响NEC发生率和存活率的重要因素。
Conclusion Gestational age is the major factor affecting the incidence and survival rate of NEC.
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