Burned coating: refers to the surface coating seriously dark, rough, such as carboncolor generally. (means high current density zone).
镀层烧焦：指镀层表面严重黑暗，粗糙，如碳色一般。(指高电流密度区)。
2
The carbon gives the bread a dark color and a crunchy texture (质地).
碳元素使得面包呈深色且口感松脆。
3
It is mostly made of ionized hydrogen and helium, though carbon, oxygen, nitrogen and other atoms are present, producing the complex color blend visible here.