双边类大作文，环境类话题
Some people claim that it is acceptable to use animals for the benefit of human beings, while others argue that it is wrong to use animals for human purposes. Discuss both views and give your own opinion.
题目来源：2013年4月18日大陆雅思大作文
1、题目大意
有些人声称，为了人类的利益而利用动物是可以接受的，而另一些人则认为人类利用动物是错误的。讨论双方观点并给出自己观点。
2、思路解析
这是一道双边类大作文，讨论的是人类利用动物是否合理。双边类的题目，需要对每个观点分别表达同意或反对，最终的结论就是我的立场，可以是中立（双方都同意或都反对），也可以是单边支持某一方立场。审题时注意一点，利用动物是为了“the benefit of human beings”，不牵扯别的目的和情况。下面月半鸭和大家一起来看下具体观点。
首先来看合理的原因，有两方面。
一是在医学领域方面，人类在研究新的药物时，需要进行大量实验来观察药物效果或者可能存在的副作用，而将研究中的药物直接用在活人身上无疑更加残忍且违背伦理的行为，因此，通过动物来进行研究是相对合理的。
二是人类本身作为杂食动物，需要通过食用肉类来果腹以及获取所需营养，因此人类捕获动物本身符合食物链的自然法则。
然后来看认为错误的原因，可以有三点。
一方面，在非必要范围中，人们依旧会利用甚至杀害动物来满足自身利益。比如大量捕猎机构、大象，仅是为了获取机构角和象牙来作为装饰品。这种非必要的需求，却导致许多野生动物濒临灭绝，无疑是残忍的。
另一方面，在一些领域有更好替代品的前提下，依然通过伤害动物来满足人们需求，不应得到支持。比如在有大量实验数据的积累的情况下，依然不断进行重复的动物实验。或是在服饰制作时，有更好的天然原材料却依然杀害动物为了获取毛皮等原材料。
最后，在大自然角度来说
3、提纲
4、高分范文示例
In an effort to improve our living conditions, people have experimented with a range of treatments, items, and procedures over the years. Animal testing probably dates back millennia, yet it remains a controversial topic in modern society. This essay will attempt to provide an overview of scenarios in which animal experiments may be acceptable or inappropriate.
On the one hand, defenders of animal research believe that major advances in battling diseases, infections, and other ailments would not have been achievable without animal research. This is because testing products on healthy humans is inhumane, and computer modelling to predict reactions is a relatively new technology that is not as reliable as animal testing. Without animal testing, medical advancements would have been inconceivable, and the majority of individuals would agree that the sacrifice was worthwhile.
Opponents argue, on the other hand, that studies undertaken simply for cosmetic goals do not justify the use of innocent animals. This is mostly due to two factors: first, it is believed that a substantial body of knowledge has been gathered from previous studies; and second, there are alternatives, such as dermatological testing and the use of natural components. For example, retail companies such as Lush and The Body Shop have gained millions by marketing themselves as natural alternatives to animal research. In view of the ultimate purpose of animal testing and the available alternatives, it is apparent that animal experimentation in this circumstance is completely unethical.
In conclusion, if the situation poses a risk to humans and computer-based alternatives are unavailable, it would be ethical to do animal tests. However, the killing of animals is deeply immoral when research is driven by weak grounds and acceptable alternatives exist.
5、相关词汇和语法结构
controversial 有争议的
circumstances 情况
advocates 支持者
viruses 病毒
breakthroughs 突破
opponents 反对者
cosmetic 化妆品
innocent 无辜的
alternatives 替代品
dermatological testing 皮肤医学测试
natural ingredients 自然原料
side-stepped 回避
premature 不成熟的
fickle 变化无常的
viable 可靠的
Inexcusable 不可原谅的
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