Now advocating birth, it is best not to let themselves left with regret.
2
文中还就涉及到的玉米杂优育种有关问题进行了讨论。
This paper also involves the problems of maize hybrid breeding.
3
目的了解欲婚人员的传染病、遗传病的患病情况，促进优生优育。
Objective to investigate the status of infectious disease and hereditary diseases in the premarital persons and promote aristogenesis and stirpiculture.
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