reverse tab反向拉舌reversev.逆转；倒退；互换；改变adj.相反的；反面的；颠倒的n.相反；背面；失败；倒档reversed return sys-tem同程式系统reverse- washing filter反冲洗过滤器reversed airblast process反向鼓风制气法reverse logistics network逆向物流网络reverse path multicasting保留路径多播reverse lever catch cover回动杆挡盖reverse cut-off current反向截止电流reverse osmosis membranes反渗透膜reverse breakdown voltage反向哗电压Reverse Triangular Merger反三角合并

1. Sperm must be capacitated before sperm ovum fusion.
   精卵融合之前精子必须获能。
2. He remains an un-impregnated ovum, an unfertilized pistil.
   他依旧是一个未受胎的卵，一个未得花粉的雌蕊。