题目原文：
Car manufacturers and governments have been eagerly seeking a replacement for the automobile’s main source of power, the internal-combustion engine. By far the most promising alternative source of energy for cars is the hydrogen-based fuel-cell engine, which uses hydrogen to create electricity that, in turn, powers the car. Fuel-cell engines have several advantages over internal-combustion engines and will probably soon replace them.
One of the main problems with the internal-combustion engine is that it relies on petroleum, either in the form of gasoline or diesel fuel. Petroleum is a finite resource; someday, we will run out of oil. The hydrogen needed for fuel-cell engines cannot easily be depleted. Hydrogen can be derived from various plentiful sources, including natural gas and even water. The fact that fuel-cell engines utilize easily available, renewable resources makes them particularly attractive.
Second, hydrogen-based fuel cells are attractive because they will solve many of the world’s pollution problems. An unavoidable by-product of burning oil is carbon dioxide, and carbon dioxide harms the environment. On the other hand, the only byproduct of fuel-cell engines is water.
Third, fuel-cell engines will soon be economically competitive because people will spend less money to operate a fuel-cell engine than they will to operate an internal-combustion engine. This is true for one simple reason: a fuel-cell automobile is nearly twice as efficient in using its fuel as an automobile powered by an internal-combustion engine is. In other words, the fuel-cell powered car requires only half the fuel energy that the internal-combustion powered car does to go the same distance.
题目音频：
学术写作：
简化大意：
教授：针对再教育或者说终生教育，成年人应该侧重于哪个方向？
Andrew：学外语
Claire：学艺术
详细题目回忆：
Doctor Diaz:
In today’s context, there’s a growing consensus that education should extend beyond high school and college, encompassing lifelong learning. Imagine you’re a student engaging with this topic. Your input is sought on which specific field adults should focus on for ongoing education. Given this perspective, the question to you is: Considering the shift towards lifelong education, which field of study do you believe adults should prioritize for their continuous learning journey?
Andrew:
In my opinion, it’s important for adults to have the opportunity to take foreign language classes as part of their lifelong education. Learning a new language can open doors to different cultures, enhance communication skills, and boost career prospects. Plus, it’s a way to keep our minds active and engaged throughout our lives. So, I believe offering foreign language courses to adults is a valuable way to support their continuous learning journey.
Claire:
I think art classes should definitely be available to adults as part of lifelong education. Engaging in art allows us to express ourselves, relieve stress, and tap into our creativity. Even if someone didn’t have the chance to explore art when they were younger, providing these classes to adults can offer them a way to discover new talents, develop new hobbies, and continue growing personally, no matter their age.
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