The emission ingredients can reflect the working condition of fuel supplying system and air supplying system, the mixing and burning condition in cylinder.

车辆的尾气成分在一定程度上反映了发动机燃油供给系统、空气供给系统的工作状况，气缸内混合气的混合和燃烧状况。

The coal screening device causes coal with different granularity to be arranged and burned on a fire grate in a layer mode according to the favorable burning condition.

煤筛分装置将不同粒度的煤按照有利燃烧的条件在炉排上分层排列和分层燃烧。

The only condition is that they should have no paint and oil spots and burning marks.

唯一的一个条件是：这些轮胎没有任何涂染、油污以及燃烧的痕迹。