We disturbed a wild boar that had been foraging by the roadside...我们惊动了一只一直在路边觅食的野猪。Two stallions fight at a wild horse conservation center in South Dakota.在南达科塔州的野马保育中心,两匹种马在搏斗....a mixture of wild and cultivated variet...
Cut it out, Perry. You've performed your heroics. It's all over now.住手吧，佩里。你已经逞过英雄了。现在一切都结束了。He said his advice was: "No heroics, stay within the law"他说自己的建议是：“不要逞英雄，要遵纪守法。”England need heroics from the captain...
染色体也决定动物的性别.Chromosomes also determine the sex of animals.四种染色体的每一种都沿着纵向分裂.Each of four chromosomes divide longitudinally.利用显微镜检查细胞染色体可以发现胎儿的性别。Microscopic examination of a cell's chromo-somes can reveal the sex of ...