In the late 1970s, the infant mortality rate for the children of illiterate mothers was around 110 deaths per thousand live births.

在1970年代后期，在文盲母亲所生的孩子中，婴儿死亡率约为每1000名活胎婴儿中有110个夭折。

youdao

The document concludes that the high risk of infant, child, and maternal mortality is associated with pregnancies where mothers are too young, too old, or have already had several children.

该文件的结论是，婴儿、儿童和产妇死亡率高的风险与母亲年龄太小、太大或已经有几个孩子的怀孕有关。

youdao

He continued by explaining the theory that parents will have more children when infant mortality is high, so as to ensure that several children will survive to take care of them as they grow old.

他继续解释他的理论，父母们将会有更多孩子当婴儿死亡率是高的，以便确保若干孩子将能生存下来去照顾他们当他们变老了。

youdao