The shock of the cold makes the metal sulfides crystallize .
低温使得金属硫化物结晶。
Garlic needs to be chopped or crushed to produce the these sulfides .
大蒜需要剁碎或压碎以制造这些硫化物。
Mining exposed the sulfides and eventually made the tailings as acidic as battery acid and full of heavy metals such as arsenic .
采矿暴露了硫化物并最终使矿渣变得象蓄电池酸液一样酸，充满了象砷那样的重金属。
The abandoned richmond mine in california has the most acidic waters in the world , courtesy of underground microbes that consume sulfides and excrete sulfuric acid .
Bacteria also thrive between teeth and gums , where they produce sulfides and other malodorous compounds , including putrescine , found in decaying meat , and isovaleric acid , which smells like sweaty feet .
