ST_006
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综合写作
The production of electricity in nuclear power plants generates radioactive waste as a by-product. The waste is often placed in canisters (containers), but it remains radioactive for thousands of years, emitting invisible radiation that is harmful to humans and other living things. Scientists are currently discussing several strategies for safely storing the canisters; they need to be stored for thousands of years until the waste loses its radioactivity.
Surface Storage
One option is to store the canisters in permanent structures above ground. If properly constructed from a radiation-blocking material like concrete, such structures should remain sealed for thousands of years. Clear instructions would ensure the structures are properly maintained so that the material does not leak out and cause damage. In addition, signs with written warnings would be posted throughout storage sites to clearly indicate the purpose of the structures.
Borehole Disposal
Another option is to store the canisters in boreholes–long, vertical holes dug deep down into the earth. The waste would be lowered into the bottom of the borehole, and the remaining space filled and sealed with radiation-blocking material. Engineers already have considerable experience drilling boreholes for experimental purposes and oil exploration. In the proper area, boreholes are stable and relatively inexpensive to create.
lce Sheet Storage
Another solution is to store the canisters under the large, uninhabited surface of solid ice that has covered Antarctica for thousands of years. Radioactive waste produces a small amount of heat, so if a canister with waste were placed on the ice sheet, its heat would melt enough ice to allow it to sink farther and farther down. As it sinks, the melted ice layers above it would freeze again, sealing the waste off from the surface. Under this ice sheet, the waste should remain isolated from the surface long enough to lose its radioactivity.
学术写作
教授：公司花钱或者提供额外假期，来让员工获取更高的学历，这个做法最大的好处或者坏处是什么？
Andrew：坏处是员工可能离职。
Claire：好处是员工更加忠诚。
Dr. Achebe: In recent corporate strategies, we’ve observed a trend where companies are offering to pay for their employees’ tuition fees or providing additional vacation time in exchange for the employees enrolling in further skills training courses, such as university programs. This approach is seen as a way to enhance the workforce’s capabilities and foster a culture of continuous learning. What do you perceive as the most significant advantage or disadvantage of such a policy?
Andrew: In my view, the downside of companies paying for employees’ further education is that it could lead to increased turnover. If workers gain new skills, they might feel empowered to seek better opportunities elsewhere. I’ve heard of cases where employees, after getting their degrees, decide to leave for more competitive roles or higher pay, which can be a significant loss for the company that invested in their education.
Claire: I see a different angle on this policy of companies funding employee education. When a company invests in an employee’s future, it sends a powerful message of value and sincerity. It’s like they’re saying, ‘We believe in you and your growth.’ For me, that kind of commitment would make me feel more dedicated to the company.
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