每日英语口语练习 2026-09-09（周三）

题材：科技社会新闻（Tech & Society News） 主题：Nuclear Fusion — The “Artificial Sun” Inching Toward Reality（核聚变：“人造太阳”正逼近现实） 来源：综合 EAST「人造太阳」1066 秒世界纪录、美国 NIF 点火里程碑、ITER 国际项目与 PBS Space Time 专题（自编核心段落） 今日时长：约 6 分钟 练习目标：跟读科技新闻段落，掌握聚变能源核心词汇与连读节奏，并能就”清洁能源未来”即兴表达观点。

📖 原文/对话（来源：科技社会新闻 · 自编核心段落，≥250 词）

For most of the past century, nuclear fusion — the process that powers the Sun — has been described as “always thirty years away.” But 2025 and 2026 have quietly shifted that timeline. In January 2025, China’s EAST tokamak, nicknamed the “artificial sun,” held plasma at over 100 million degrees Celsius for 1,066 seconds — more than seventeen minutes — setting a world record and proving that sustained, stable fusion conditions are no longer science fiction. Around the same period, the U.S. National Ignition Facility (NIF) repeated its 2022 “ignition” milestone, producing more energy from a fusion reaction than the lasers used to trigger it. Meanwhile, the international ITER project in southern France is assembling the world’s largest magnetic-confinement reactor, while a wave of private startups — backed by more than 7 billion yuan in Chinese financing alone in early 2026 — race to build compact, cheaper devices.

Why does this matter? Unlike today’s nuclear fission plants, which split heavy atoms and leave long-lived radioactive waste, fusion joins light hydrogen isotopes into helium, releasing enormous energy with no carbon emissions, no meltdown risk, and waste that decays in decades rather than millennia. One pound of fusion fuel carries the energy of thousands of barrels of oil, and its ingredients — deuterium from seawater, tritium bred from lithium — are abundant on Earth. The remaining hurdles are engineering, not physics: how to bottle a star at 100 million degrees without vaporizing the container, how to breed enough tritium, and how to turn brief bursts of energy into a steady, grid-ready supply. If those walls fall, fusion could deliver effectively limitless, clean power to every corner of the planet.

🎬 视频/音频资源

• TED: Tammy Ma — The secret force for limitless energy? Lasers（TED2024，NIF 点火亲历科学家讲激光聚变）
• TED-Ed: How close are we to powering the world with nuclear fusion? — George Zaidan（动画科普：聚变原理与商业化进度）
• PBS Space Time: The Final Barrier to (Nearly) Infinite Energy（深度解读如何”装下一颗星”——磁约束与反应堆壁难题）
• China’s Artificial Sun: EAST 100M°C Record（News explainer）（中国”人造太阳”突破短视频概览）

📝 重点词汇（8-10 个）

• fusion n. 核聚变 — Nuclear fusion powers the Sun and every star in the universe.
• fission n. 核裂变 — Today’s nuclear plants rely on fission, not fusion.
• plasma n. 等离子体 — Fusion requires heating hydrogen into a plasma state.
• tokamak n. 托卡马克（环形磁约束装置） — EAST is a fully superconducting tokamak.
• ignition n.（聚变）点火 — NIF achieved fusion ignition for the first time in 2022.
• isotope n. 同位素 — Deuterium and tritium are isotopes of hydrogen.
• deuterium n. 氘（重氢） — Deuterium can be extracted from seawater.
• tritium n. 氚（超重氢） — Tritium must be bred from lithium inside the reactor.
• containment n. 约束；容纳 — Magnetic containment keeps the plasma away from the walls.
• abundant adj. 丰富的 — Fusion fuel is abundant on Earth.

💬 跟读练习建议

1. 盲听一遍：先听 PBS Space Time 专题，抓大意，不要看稿。
2. 逐句影子跟读：以「原文」段落为单位，听一句、停顿、模仿一句并录音；重点关注 fusion / tokamak / ignition 等术语的发音。
3. 词汇打磨：从 10 个重点词中挑 5 个，先慢速带音标读 2 遍，再加速到自然语速。
4. 金句固化：把今日金句连续朗读 3 遍，注意重音与停顿节奏。
5. 自我纠音：回放自己的录音，对照原声音频标记差异（尤其 /ʒ/ 与 /θ/ 是否到位）。

🔄 即兴口语练习

Q1：If fusion became cheap and unlimited, how would your daily life change? 参考要点：电费大幅下降、电动汽车普及、海水淡化解决缺水、太空探索提速；可从”能源自由”角度展开 30 秒独白。

Q2：Some argue we should spend the money on wind and solar instead. Do you agree? 参考要点：可再生能源部署更快、成本已下降；聚变是”基荷”互补而非替代；可表达”两者并行”的折中立场。

Q3：Fusion still produces waste — it just decays in decades, not millennia. Does “clean energy” still worry you? 参考要点：对比化石燃料与裂变的长寿命废料；聚变的本质安全性（断能即停）；讨论公众认知与风险沟通。

📋 发音技巧提示

1. /ʒ/ 浊辅音：fusion /ˈfjuːʒən/ 中的 /ʒ/ 需双唇略圆、舌尖接近上颚，避免发成 /z/。
2. 多音节词重音：tokamak（重音在第一音节）、tritium /ˈtrɪtiəm/（tri-ti-um 三音节，重音在首）、containment（con-TAIN-ment，重音在第二）。
3. 连读与弱读：原文 “over 100 million degrees” 中 over→100 可连读为 /əʊvərˈhʌndrəd/；“at over 100 million” 注意 million 的弱读 /ˈmɪljən/；整段多用意群停顿，避免逐词蹦。

🗣 今日金句

“Fusion is the ultimate energy source — not least because the fuel we need is also very abundant.” — Tammy Ma（聚变是终极能源——尤其因为我们需要的燃料也极其丰富。）

去重依据：已查记录表，主题「Nuclear Fusion / 核聚变 / 人造太阳」未出现过（已练科技社会新闻：轴向磁通电机、Wi-Fi识别人、电动皮卡、AI数据中心热岛/能耗、AI语音克隆诈骗、AI助手点外卖、AI agents低效、AI误报代写、AI凝结尾迹、微塑料入体、培育肉，均不重合）。