| 单词 | topping | 
| 释义 | topping [`täp·iŋ]  CHEMICAL ENGINEERING The distillation of crude petroleum to remove the light fractions only; the unrefined distillate is called tops.  CIVIL ENGINEERING A layer of mortar placed over concrete to form a finishing surface on a floor, driveway, sidewalk, or curb.  TEXTILES A step in the dyeing process in which a dyed material is placed in a bath of another color.  | 
	
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