常見例句雙語例句But conventional cross-breeding is costly and laborious for grapes.但是傳統(tǒng)的葡萄雜交非常費時費力且價格昂貴。But what limits are there to the kind of reiterative, informatics cross-breeding underlying their generation?但是什么局限了它們一代代信息雜交存在某種反復或重復?The team made the discovery while hunting for genes that boost heterosis, the phenomenon by which cross-breeding two varieties of plants produces more vigorous hybrid offspring with higher yields.研究團隊在尋找促進雜交優(yōu)勢的基因的時候發(fā)現(xiàn),將兩種植物雜交出的更具優(yōu)勢的子代,其產(chǎn)量更高。權威例句But many ranches are now cross-breeding the zebu with Aberdeen Angus and other European stock.ECONOMIST: BrazilAs for cross-breeding, Mother Nature had done it first, cross-pollinating different wild grasses until they produced a grain that could eventually expand into modern bread.ECONOMIST: Norman Borlaug 返回 cross-breeding