单词	field line
释义	field line noun : any one of a system of nonintersecting lines so drawn in mapping a vector field that the direction of the tangent to it at any point is that of the vector at that point Word History First Known Use 1888, in the meaning defined above
随便看	dreary dreck drecks dred-per dreddour dredge dredge (up) dredge corn dredge up dredged belt fish belt highway belt leather belt line belt lines belt loom belt of cementation belt of fire belt pulley belt punch belt railroad belt sander belt shifter belt up belt-and-suspenders

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