当你早上醒来查看天气预报，或者在厨房烘焙面包，又或者是感冒发烧测量体温，温度单位无处不在。然而，你是否好奇过，为什么美国人坚持使用华氏度（°F），而世界上其他绝大多数国家都在使用摄氏度（°C）？这两套系统背后的逻辑究竟是什么？
Whether you're checking the weather forecast, baking bread in the kitchen, or taking your temperature when you feel ill, temperature units are everywhere. But have you ever wondered why Americans stick to Fahrenheit (°F) while the rest of the world uses Celsius (°C)? What is the underlying logic behind these two systems?
1. 华氏度的起源：从人体到盐水 / The Origin of Fahrenheit
华氏温标由荷兰物理学家丹尼尔·加布里埃尔·华伦海特于1724年创立。有趣的是，他最初定义的0度并不是冰的熔点，而是冰、水和氯化铵混合物的最低温度。他将人类的体温定为96度（后来修正为98.6度）。在当时，华氏度是世界上第一种能够精确复现结果的温标。
The Fahrenheit scale was established by Dutch physicist Daniel Gabriel Fahrenheit in 1724. Interestingly, his original 0 degrees wasn't the melting point of ice, but the lowest temperature of a mixture of ice, water, and ammonium chloride. He set the human body temperature at 96 degrees (later corrected to 98.6). At the time, it was the first scale that allowed for accurate reproduction of results.
2. 摄氏度的优越性：十进制的胜利 / Why Celsius Won
摄氏度由瑞典天文学家安德斯·摄尔修斯于1742年提出。它的逻辑极其简单：在标准大气压下，水的冰点定义为0度，水的沸点定义为100度。这种以100为进位的系统完美符合了现代科学对简洁性的追求。这也是为什么它成为了国际单位制（SI）的一部分。
Celsius was proposed by Swedish astronomer Anders Celsius in 1742. Its logic is incredibly simple: under standard pressure, the freezing point of water is 0, and the boiling point is 100. This decimalized system perfectly matches the modern scientific pursuit of simplicity, which is why it became part of the SI units.
3. 换算数学：不只是加减法 / The Tricky Math
与长度或重量不同，温度的换算不仅涉及倍数，还涉及偏移量（Offset）。因为摄氏度的0度（冰点）对应华氏度的32度。
Unlike length or weight, temperature conversion involves not just multiples, but an offset. This is because 0°C (freezing) corresponds to 32°F.
Fahrenheit to Celsius: °C = (°F - 32) × 5/9
核心温度对照表 / Common Temperature Comparison
| Description | Celsius (°C) | Fahrenheit (°F) |
|---|---|---|
| Absolute Zero / 绝对零度 | -273.15 | -459.67 |
| Water Freezes / 水冰点 | 0 | 32 |
| Room Temp / 室温 | 20-25 | 68-77 |
| Body Temp / 人体温 | 37 | 98.6 |
| Water Boils / 水沸点 | 100 | 212 |
结论 / Conclusion
虽然科学家们更喜欢使用开尔文（Kelvin）来研究宇宙的奥秘，但在日常生活中，理解°C和°F的转换依然至关重要。如果你正准备前往美国旅行，或者正在阅读一份国外的科学文献，欢迎使用我们的 在线温度单位转换器，让你在冷热之间瞬间找到精准答案。
While scientists prefer Kelvin (K) for studying the universe, understanding °C and °F remains crucial for daily life. If you are traveling to the USA or reading a foreign scientific paper, feel free to use our Online Temperature Converter to find the exact answer instantly.