本课您将学到:缩写知多少,年代和年龄的笼统表示法,强调句式 基因被称作遗传密码,它决定着生物的一切特征。人类的伟大也许就在于敢于挑战自然规律,就连基因也要改变!转基因食品(GM foods),你敢吃吗? GM stands for(代表) genetically modified. This means that the genes in food plants are altered(更改、改变). Genetic modification is done to make the plants resistant(抵抗的) to insects and chemicals, or to improve quality. 很久以来,人们就试图控制植物的生长速度,可知道人们掌握了基因技术,这个目标才得以实现,直到: It was only in the 1990s that scientists(科学家) learned how to control(控制) the genes in food plants. 转基因食品是研究出来了,可人们不敢吃,因为: Many people around the world think these new methods(方法) create food that can be harmful to human health and to the Earths environment. 没办法,政府只好采取措施,在转基因食品上贴上标签(put labels on),以便人们自行选购。 你相信这些科学家的研究成果吗?你会选购带有GM标签的食品吗?唉,原来科技进步也是一件让人欢喜让人忧的事呢! 「读书笔记」 |