以上来源于: WordNet
N → another name (esp us) for birth rate
Reduction of competition for food stimulates both natality and survival.
食物竞争的减少，刺激了出生率和存活力。
Reduction of competition for food stimulates both natality and survival .
食物竞争的减少，刺激了出生率和存活力。
The effect of crowding and physiological stress and shortage of food resources were the main reasons for the decline of population natality and yearly increase rate.
种群密度过高产生的拥挤效应和食物资源不足是造成种群出生率和年度增长率下降的主要原因。
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