双语科普：春分立蛋是真的吗？
Can You Really Balance an Egg Today?
你今天真的能把鸡蛋立起来吗？
It's a popular party trick each spring equinox: Try to balance an egg on its end, and as if by magic, it works!
每年春分时节，都有一个很受欢迎的派对小把戏：试着把鸡蛋竖在尖端，它居然像施了魔法一样，真的能立住！
The theory?
背后的说法是什么呢？
Because Earth's gravity is perfectly aligned that day — eggs are able to stand on their ends. And it's not just eggs. It's brooms, too ... at least, in theory.
据说因为在那一天，地球引力处于完美对齐的状态，所以鸡蛋能立起来。而且不止鸡蛋，扫帚也能这样……至少从理论上来说是这样。
Sadly, however, the impressive stunt actually has nothing to do with the equinox. Believe it or not, eggs (and yes, brooms) can be balanced on their ends every day of the year, not just one. Don't believe it? Here's what's really going on.
然而遗憾的是，这个令人惊叹的小技巧其实和春分毫无关系。信不信由你，鸡蛋（没错，还有扫帚）一年中的每一天都能竖起来，绝非只有春分这一天。不相信？下面就来揭晓真相。
Why is it rumored to have such powerful properties?
为什么会有关于春分有这种“神奇力量”的传言呢？
Supposedly, the practice originated in China as a Chinese New Year tradition, with the idea being that the Earth and moon's perfect alignment on that day helps to balance gravitational forces.
据称，这一做法起源于中国，最初是春节的一项传统，人们认为在那一天，地球和月球处于完美对齐的状态，有助于平衡引力。
However, while the idea of an egg balancing on the equinox is anecdotally backed up by YouTube videos and successful first-person tests, Snopes helpfully points out that "since the vast majority of people never see or try balancing eggs on their ends on any day other than the equinox ... many of them come away from the experience believing that something special must have occurred on that particular day."
不过，尽管“春分立蛋”的说法有YouTube视频和亲身成功尝试作为轶事佐证，但Snopes网站一针见血地指出：“由于绝大多数人除了春分之外，从不在其他日子尝试或见证立蛋……他们大多会因为这次成功的经历，误以为春分当天一定发生了什么特别的事。”
While it can be challenging to balance ordinary objects like an egg or a broom on their end, it is certainly not any easier or more difficult depending on the day of the year. This is because Earth's gravitational pull is the same every day, no matter which way it "appears" tilted toward the sun.
虽然把鸡蛋、扫帚这类普通物品竖起来确实有难度，但这难度并不会因日期不同而有所变化。原因很简单：无论地球“看起来”朝着太阳倾斜多少，它每天的引力都是相同的。
2025年9月1日于北城家园
