n. 税款, 关税

vt. 决定关税, 分类课税

[经] 税, 进口税, 关税

Impost \Im"post\, n. [OF. impost, F. impot, LL. impostus, fr. L.
impostus, p. p. of imponere to impose. See {Impone}.]
1. That which is imposed or levied; a tax, tribute, or duty;
especially, a duty or tax laid by goverment on goods
imported into a country.

Even the ship money . . . Johnson could not
pronounce to have been an unconstitutional impost.
--Macaulay.

2. (Arch.) The top member of a pillar, pier, wall, etc., upon
which the weight of an arch rests.

Note: The impost is called continuous, if the moldings of the
arch or architrave run down the jamb or pier without a
break.

Syn: Tribute; excise; custom; duty; tax.