4.Fuchsias are easy to..propagate from cuttings. 5.Most plants propagate by seed. 大多数植物靠种子繁殖。 6.We should propagate scientific ideas . 我们应该传播科学思想。 7.The light wave propagates in a straight line. 光波以直线形式传播. 8.The crack propagates along slip face. 断口中的二...