基础英语轻松学【22】改变基因，改变生活
<p> 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</p><p> 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（<span word="GM">GM</span> <span word="foods">foods</span>），你敢吃吗？</p><p> <span word="GM">GM</span> <span word="stands">stands</span> <span word="for">for</span>（代表） <span word="genetically">genetically</span> <span word="modified">modified</span>. <span word="This">This</span> <span word="means">means</span> <span word="that">that</span> <span word="the">the</span> <span word="genes">genes</span> <span word="in">in</span> <span word="food">food</span> <span word="plants">plants</span> <span word="are">are</span> <span word="altered">altered</span>（更改、改变）. <span word="Genetic">Genetic</span> <span word="modification">modification</span> <span word="is">is</span> <span word="done">done</span> <span word="to">to</span> <span word="make">make</span> <span word="the">the</span> <span word="plants">plants</span> <span word="resistant">resistant</span>（抵抗的） <span word="to">to</span> <span word="insects">insects</span> <span word="and">and</span> <span word="chemicals">chemicals</span>, <span word="or">or</span> <span word="to">to</span> <span word="improve">improve</span> <span word="quality">quality</span>.</p><p> 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：</p><p> <span word="It">It</span> <span word="was">was</span> <span word="only">only</span> <span word="in">in</span> <span word="the">the</span> 1990<span word="s">s</span> <span word="that">that</span> <span word="scientists">scientists</span>（科学家） <span word="learned">learned</span> <span word="how">how</span> <span word="to">to</span> <span word="control">control</span>（控制） <span word="the">the</span> <span word="genes">genes</span> <span word="in">in</span> <span word="food">food</span> <span word="plants">plants</span>.</p><p> 转基因食品是研究出来了，可人们不敢吃，因为：</p><p> <span word="Many">Many</span> <span word="people">people</span> <span word="around">around</span> <span word="the">the</span> <span word="world">world</span> <span word="think">think</span> <span word="these">these</span> <span word="new">new</span> <span word="methods">methods</span>（方法） <span word="create">create</span> <span word="food">food</span> <span word="that">that</span> <span word="can">can</span> <span word="be">be</span> <span word="harmful">harmful</span> <span word="to">to</span> <span word="human">human</span> <span word="health">health</span> <span word="and">and</span> <span word="to">to</span> <span word="the">the</span> <span word="Earths">Earths</span> <span word="environment">environment</span>.</p><p> 没办法，政府只好采取措施，在转基因食品上贴上标签（<span word="put">put</span> <span word="labels">labels</span> <span word="on">on</span>），以便人们自行选购。</p><p> 你相信这些科学家的研究成果吗？你会选购带有<span word="GM">GM</span>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！</p><p> 「读书笔记」</p>
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