pro·rate /(ˌ)proˈret, ˈproˌ/
(vt.)(vi.)比例分配,分派
Pro·rate v. t. [imp. & p. p. Prorated; p. pr. & vb. n. Prorating.] To divide or distribute proportionally; to assess pro rata. [U.S.]
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prorate
v 1: make a proportional settlement or distribution
2: divide or assess proportionally; "The rent was prorated for
the rest of the month"