Carbon dust and oil build up in large motors and cause them to short-circuit.
碳尘和燃油在大发动机里越积越多,造成了发动机短路。
《柯林斯英汉双解大词典》
2
In 1829, he began working with Louis Daguerre to improve photography. Together they developed the "Physical Carbon Printing Method," which uses lavender oil.