优良品种并不一定都是来自当地。实践证明,引种是解决品种问题的一个简单易行而又迅速有效的途径。我国曾经从国外引进过不少优良品种,对促进农业生产的发展起到了巨大的作用。 Good varieties are not always from the local. Practice has proved that the introduction of variety is to solve the problem of a simple and quick and effective way. China has introduced many excellent varieties from abroad and played a huge role in promoting the development of agricultural production.