natural bow静挠度, 自然挠度naturaladj.自然的；天然的；私生的Natural forest resource protection project天保工程Naturalization Trend of Household CleanserNatural forest of Phyllostachys heteroclda天然水竹natural non-circumfluence control method自然无环流控制方式natural tourism resource planning contract自然旅游资源规划合约Natural Resource and Environmental Economy自然资源与环境经济学natural diamond nuclear radiation detector天然金钢石核辐射探测器natural language question answering system自然语言问答系统natural convection air-cooled evaporator自然对流空冷式蒸发器Natural landscape and environmental ecology自然风光、环境生态

1. The sows of natural oestrus ovulated more swiftly than the superovulation, and the embryo quality of nature was better.
   超数排卵影响胚胎的质量，自然发情母猪较超数排卵母猪排卵较快，且胚胎质量较好。