题目原文：
Genetic modification, a process used to change an organism’s genes and hence its characteristics, is now being used to improve trees. Through genetic modification, it is possible to create trees that produce more fruit, grow faster, or withstand adverse conditions. Planting genetically modified trees on a large scale promises to bring a number of benefits.
First, genetically modified trees are designed to be hardier than natural trees; that is, they are more likely to survive than their unmodified counterparts. In Hawaii, for example, a new pest-resistant species of papaya tree has been developed in response to ringspot virus infestations that have repeatedly damaged the native papaya-tree population. Planting the genetically modified papayas has largely put an end to the ringspot problem.
Moreover, genetically modified trees promise to bring a number of economic benefits to those who grow them. Genetically modified trees tend to grow faster, give greater yields—of wood, fruit, or other products—and be hardier. This allows tree farmers to get faster and greater returns on their farming investment and save on pesticides as well.
Finally, the use of genetically modified trees can prevent overexploitation of wild trees. Because of the growing demand for firewood or building timber, many forests around the world are being cut down faster than they can be replaced. Introducing genetically modified trees—designed for fast growth and high yield in given geographic conditions—would satisfy the demand for wood in many of those areas and save the endangered native trees, which often include unique or rare species.
题目音频：
学术写作：
教授：做新科技产品的尝鲜者，有什么好处坏处？
Andrew：坏处就是太贵了
Claire：不见得贵，因为公司会给折扣。而且，尝鲜者的观点可以帮助产品提升。
Doctor Achebe: Today, we are going to discuss how successful software and tech products are launched and marketed. When companies launch and market these products, early adopters are important. Early adopters are customers who tend to buy the latest products and like to be the first to try out new features and processes. In today’s discussion, I would like you to describe at least one advantage or disadvantage of being an early adopter. Please explain why you think this way.
Andrew: One obvious disadvantage is that early adopters probably pay a lot more for brand-new technology. When products first come out, they’re often quite expensive, but once they are on the market for a while, the price usually drops. That’s why I usually wait to buy new technology.
Claire: New tech products might not always be more expensive – sometimes the company will give people a new product at a discount in exchange for trying it out and giving feedback on it. In fact, to me, that’s the biggest advantage of being an early adopter – your feedback can guide future improvements to a product. That’s a powerful feeling.
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