今天前程百利小编为大家分享的是托福听力最新生物科技-气味偏好与基因。小编已经把段子里的疑难词汇、疑难语法和段落大意分析出来了，大家可以参考一下，多积累一些背景知识，攻克托福听力。
We all perceive(察觉) smells differently—and two people’s preferences(偏好) may give clues to their degree of genetic similarity.
段落大意：在《科学人60秒钟》里面第一段都是本篇文章的主要内容。所以本篇的主要内容是有相同味道偏好的人基因也比较相似
疑难句：and引导两个并列句
Two decades ago, Swiss researchers had women smell the tee shirts that various men had slept in for two nights. Turned out that if women liked the aroma(芳香) of a particular shirt, the guy who’d worn it was likely to have genetically coded(编码) immunity (免疫力)that was unlike the woman’s. Well the effect isn't just limited to sweaty shirts. Turns out we all smell things a little differently—you pick up a note of cloves(丁香), say, where I smell something more soapy(含有肥皂的)—and that too gives clues to our degree of genetic similarity.
段落大意：用实验证明，第一段中的事实，就像是托福听力中的举例原则，用实验证明事实
疑难句：第一句中有that引导的定语从句;第二句中有if引导的条件状语从句，还有who引导的定语从句;最后一句比较长，包含一个where引导的地点状语从句，还有that引导的宾语从句。
Researchers tried that test with 89 people—having them sniff (嗅)a couple dozen samples, and label each one using terms like lemony(柠檬的), coconut(椰子), fishy and floral(花的). And each volunteer classified the scents differently enough that the researchers could single them out in subsequent(随后的) tests, based on what they called each subject’s "olfactory(嗅觉的) fingerprint."
段落大意：本段是通过闻一些不同的气味然后进行归类，通过这个实验来看气味有相同偏好的人是否基因比较相似。
疑难句：第一句中有that引导的宾语从句;第二句中有that引导的定语从句，还有what引导的宾语从句。
Researchers then repeated that sniff test on another 130 subjects. But this time they did a blood test, too, to figure out each person's HLA(人类白细胞抗原(human leukocyte antigen)type—an immune factor that determines whether you'll reject someone's organ, for example. They found that people who perceived smells similarly also had similar HLA types. Study author Lavi Secundo, a neuroscientist (神经系统科学家)at the Weizmann Institute of Science in Israel, says the smell test could have real-world applications(应用). "For organ donation you can think of this method as a quick, maybe a quick and dirty, method to sift (筛选)between the best and the rest." He and his colleagues say it might even eliminate(消除) the need for 30 percent of the HLA tests done today.
段落大意：由于有相同气味偏好的人们他们的基因比较相似，通过实验可以用来筛选器官移植的人员，这样可以减少很多不必要的步骤。
疑难句：第一句中有that引导的宾语从句;第二句中有that引导的定语从句;第三句中
That引导的宾语从句。
Of course, there are additional applications. "The other thing we'd like to take it from here is kind of to build what you would like to call a social network based on the sense of smell. You would get a set of scratch (刮)and sniff cards, you can sniff them, derive your olfactory fingerprint, and then you can look up for people who are similar to you or dissimilar to you in olfactory perception." Factor in the 20-year-old tee-shirt study and olfactory fingerprints should also play a role in romantic preferences. Which means that some day a smell-based service could challenge eharmony.com for matchmaking supremacy(霸权).
段落大意：本段讲的主要内容是气味相同与否还可以有额外的作用。还可以利用气味偏好寻找对象等一些实际的作用。
疑难句：第二句中有what引导的宾语从句;第三句中有who引导的定语从句;第五句中
That引导的宾语从句。
好了，以上就是前程百利小编为大家整理的托福听力生物类最新科技。相信大家一定有所收获，希望能在备考的路上助大家一臂之力。最后，小编预祝大家在托福考试中取得好成绩。
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