expanding
 展成級數; 膨脹


 expanding
 擴充 擴展


 Ex·pand v. t. [imp. & p. p. Expanded; p. pr. & vb. n. Expanding.]
 1. To lay open by extending; to open wide; to spread out; to diffuse; as, a flower expands its leaves.
    Then with expanded wings he steers his flight.   --Milton.
 2. To cause the particles or parts of to spread themselves or stand apart, thus increasing bulk without addition of substance; to make to occupy more space; to dilate; to distend; to extend every way; to enlarge; -- opposed to contract; as, to expand the chest; heat expands all bodies; to expand the sphere of benevolence.
 3. Math. To state in enlarged form; to develop; as, to expand an equation. See Expansion, 5.


 Ex·pand·ing, a. That expands, or may be expanded; extending; spreading; enlarging.
 Expanding bit, Expanding drill Mech., a bit or drill made adjustable for holes of various sizes; one which can be expanded in diameter while boring.
 Expanding pulley Mach., a pulley so made, as in sections, that its diameter can be increased or diminished.

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 expanding
      adj : increasing in area or volume or bulk or range; "an expanding
            universe"; "an expanding economy"