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???
? ? ?
? ?? math cracks a
knuckle-cracking mystery
knuckles cracking. you may not mind the sound. you may despise it.
or you could study it.
指节开裂。你可能没有注意到它的声音。你可能会鄙视它。再或者你可以研究它。
?
couple years back, vinny suja was taking a biomechanics class at
the french polytechnic school, outside paris. and he was on the
hunt for the perfect class project.
几年前，vinny suja在巴黎郊外的法国理工学院攻读生物力学课程。他正在寻找完美的课程项目来进行科研。
?
"even though they suggested many projects, i couldn’t find one
which was both practical and that i could complete within
the
framework of this class. so in frustration, i was cracking my
knuckles one day and that’s when i realized—’huh, that’s
interesting.’"
“尽管他们提出了许多项目，但我找不到一个既实用又能在本课程框架内完成的项目，所以在挫折中，有一天我开始指责我自己，当时我意识到- ’呃，
那很有意思。’”
?
and so a project was born: the physics of knuckle cracking. it’s
actually a subject of intense scientific investigation. back in
1971, scientists figured they knew how it worked: the cracking
sound was caused by bubbles popping within the fluid surrounding
the knuckles.
所以一个项目终于诞生了：指节开裂的物理学。它实际上是一项深入科学调查的课题。早在1971年，科学家们就发现他们知道它是如何工作的原理：裂纹的声音是由指关节周围流体内的气泡爆裂引起的。
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