|
|
采用经典听力材料“美国之音”，纯正美语，磨练听力。每天听写1~1分半分钟，然后翻译、总结，巩固提高。These days, if we hear about two different plants being combined, the first thing we might think of is modern biotechnology. But the low-technology process of grafting remains an extremely important form of genetic engineering in agriculture.
Many kinds of plants are grown not from seeds but from …这些天,如果我们听到两种植物被结合在一起,我们首先会想到现代生物技术。但是低端技术的嫁接过程仍旧是一个基因工程中一种极其重要的农业。
许多种类的植物不是由种子长成的,而是由活的植物体的一部分长成。农民上剪下其分支或嫩芽,从一个植株,然后将它们种在另一相关品种的植物上。用来嫁接的枝条或花蕾我们叫做“接穗”。… |
|
发表于 2016-8-2 14:15:49