[Watch] 為什麼折關節會發出聲音?

  

Notes:
1. 伸展關節的時候，關節內的滑液體積變大，壓力變小，原本溶解在裏頭的氣體就析出，泡泡生成的時候就發出聲音。
2. 因為是氣泡生成，要等到氣泡在溶回去才有辦法再發出聲音。所以通常要等一會，你才能在同一個關節發出聲音
3. 了解發出聲音的原理後，就可以知道，多折幾次手指關節，不會得關節炎，關節不會變粗。
4. 折關節真正的危險，大概是讓身邊的人覺得你很討厭吧，XD
5. 原來人的關節本身就是個泡泡墊 哈哈


Quotes: 

But the biggest proven danger seems to be annoying those around you.

Words to take a way:
1. 劈啪聲: crackle
2. 讓人不爽的、討厭的: noxious
the crackle of popping joints is either the sound of sweet relief or the noxious tones of a stomach-turning habits
3. 氣球(泡)破掉聲: pop
Why does bending your joints in a certain way make them pop like that
4. 韌帶: ligaments
rapidly stretching ligaments
5. 磨: grind
actual bones grinding against each other
6. 脊椎: vertebrate
Many people also crack the joints between vertebrate in their neck and back
7. 潤滑的: lubricating
synovial fluid, which contains long lubricating molecules, like hyaluronic acid and lubricin
8. 差不多； more or less
9. 蛋黃: egg yolk
Synovial fluid is more or less the texture of egg yolk
10. 緩衝: cushion
11. 滑動: glide past
Its primary purpose is to cushion the bones and help them glide past each other
12. 軟骨: cartilage
It also contains phagocytic cells that help clean up any bone or cartilage debris that ends up in the joint
13. 熱衷的: dedicated
dedicated knuckle-, neck- and back-crackers say the habit makes their joints fell looser and more flexible
14. 關節炎: arthritis
Cracking your joints will give you arthritis
15. 滑稽的模仿: parody
16. 古怪的: wacky
Ig Noble prize, a parody of the Nobel Prize that recognizes wacky, but weirdly fascinating scientific accomplishments