A | According to data collected by AP, more than one million Democrats have registered as Republicans during the course of the past twelve months, most notably among independent "swing voters" in highly-populated suburbs, where presidential and national congressional elections are usually decided. AP in its report published on Monday said the switch also encompassed agricultural regions, poor inner cities, and small towns.,The Democratic voter mass defections coincide with Biden’s approval ratings sinking to historical lows as inflation runs at all-time highs with mid-term elections looming in November.,Meanwhile, the White House’s policies toward the conflict in Ukraine are also becoming less popular. A poll released on Tuesday by Morning Consult Global shows American support for sanctions against Russia is steadily declining - largely because of rising energy costs.,"Workers and seniors are ravaged by an inflationary curse sparked by an inept war against the fossil fuel industry," political analyst and former hedge fund manager, Charles Ortel, said when asked about the Democratic voter exodus.,The Democratic voter defections and low approval ratings, he added, could indicate Biden administration efforts to rally patriotism around his "tough" policies against Russia over Ukraine have failed.,Biden Blames 'Putin's Tax' for Rising Food, Gas Prices in US During Speech on Record Inflation10 June, 18:22 GMT,Political commentator and historian Dan Lazare believes the fact voters are switching parties is less an endorsement of the Republican Party than a loss of confidence in Democrats, especially in their handling of the Ukraine crisis and the related rise in gas prices.,"Skyrocketing gas prices are the gift that keeps on giving - for the Republicans, that is. The war in Ukraine is turning into a Democratic nightmare as Russia continues to reap real battlefield gains," Lazare said. "So, what Democrat wouldn't lose faith given a record like that?",Ortel said history suggests that citizens reluctantly support foreign conflicts even when leaders provide compelling evidence that the causes are justified. Not to mention, US efforts that started under the Clinton administration to push NATO eastward have never been explained nor have potential costs and complaints by the Russian side, Ortel said.,"No sane actor wants perpetual conflict," Ortel explained. "And no American would tolerate parallel expansion into Mexico or Canada by Russia.",Other Drivers of Discontent,Ortel also attributed the voter surge away from the Democrats to the party’s "intolerant" attitude, including toward those who oppose the administration’s Ukraine policies. The Democratic Party used to be a group that embraced cooperation and was tolerant of perspectives that competed with liberal or progressive views. However, in recent years that has changed, Ortel said.,"Particularly under the Obama-Biden Administration, tolerance for other viewpoints was replaced with a ‘take-no-prisoners’ approach towards any challengers," Ortel said.,To make matters worse, the analyst added, Biden administration officials propagate theories and slogans claiming they are succeeding "when even unschooled citizens see clearly that Biden and his team are rapidly wrecking the American economy and what remains of America's standing abroad.",Other drivers of voters fleeing the Democratic Party are the questions surrounding the commander-in-chief’s mental stability in light of nonstop gaffes and concerns over Vice President Kamala Harris’s capabilities, Ortel said.,"Joe Biden is clearly not playing with mental faculties intact nor is Kamala Harris fit to replace him," Ortel said.,Lazare has pointed to Biden’s dismal domestic policy record as another culprit.,"Joe Biden is The Incredible Shrinking President: His one significant success, the $1.9-trillion COVID-19 relief bill that passed in February 2021, has roundly backfired by giving inflation a significant boost. Everything else has meanwhile flopped," he said.,Meanwhile, Lazare added, voting reform is dead in the water, student debt relief is stalled, and there is a dispiriting deadlock over gun control in the wake of mass shootings.,Although the midterm congressional elections were still four months away, all signs already pointed to a historic catastrophe for the Democrats, Lazare warned.,"Predicting an election that's still four months away is risky business. But given that Biden's poll numbers are still sinking - the last is just 36%! - and given that inflation is accelerating, I don't see how the midterms can be anything less than a Democratic debacle," Lazare said.。
B | 杭州造出了可量产“超级冰箱”。2025年8月，杭州白马湖实验室造出了一台“超级冰箱”。在零下268.95摄氏度的液氦温区，这台脉管制冷机的制冷量达到了1.8到2瓦，降温时间稳定在45分钟左右。这个温度，离绝对零度（零下273.15摄氏度）只差4.2开尔文，被称为现代前沿物理世界的“门槛温度”。今年5月，记者曾专访“超级冰箱”研发团队。这是国内首台采用单一气库技术路线、实现1.5瓦以上制冷量的脉管制冷机，近日，正式通过量产验证。
C | 怎么理解这台“超级冰箱”的原理？白马湖实验室氢能储运团队独立首席研究员方凯解释：气体被压缩的时候，会放热。
D | 反过来，如果让高压气体“嘭”一下释放出来，猛地膨胀，它就会疯狂吸热，周围就会冷下来。这就是“脉管制冷”技术。这台“超级冰箱”主要由压缩机、旋转阀和冷头三部分组成。今年3月，设备在实验室完成了性能验证，制冷量、降温速度、功耗等核心指标均达到国际先进水平，而成本只有进口设备的2/3。按照规划，一年可生产“超级冰箱”50至100台。这台“超级冰箱”到底有什么用？在量子计算领域，它是量子比特安静计算的“绝对静室”。量子比特极其脆弱，任何一点热量干扰都会让它出错。极低温环境能让它摆脱热噪声，稳定地进行计算。在医疗领域，它是医用核磁共振成像设备的核心部件，让超导磁体稳如磐石。“没有这个温度环境，所有的高端应用，都是空中楼阁。”方凯说。长期以来，脉管制冷技术和机器核心组件被国外垄断。这次突破，不仅打破了国外技术垄断和出口限制，更补上了能源科技与量子产业全国产化链条上的关键一环。
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