The botanists of the world keep a gene bank to preserve seeds that may or may not be needed now, because you never know what problems may come up with varieties that are flourishing now, and they might be needed later.
世界植物學家有一個「基因庫」，那怕是現在不需要的種子也還是好好保存，因為任何人都不知道現在繁茂的種子以後會有什麼毛病，到那時候，你會需要別的種子。