The genetic correlation between the birth weight, weaning weight and the other propagation traits mostly were weak positive correlation or negative correlation.
初生重、断奶重分别与其他各繁殖性状间的遗传相关和表型相关大多为弱的正相关或负相关。
High disease economical risk and weak anti-risk power are the traits of the rural elderly.
农村老年人是一个疾病经济风险较大，而自身抗风险能力却很弱的群体。
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