少量

a little; a small amount; a few; a bit of; a small quantity of; in small quantities; a little bit; in dribs and drabs; drop; grain; inch; ounce; taste; spot; element; hint; sprinkle; minimal; limited; slight; light; frugal; fractional; marginal; minimally; sparingly; slightly; lightly; marginally; little

杂质

impurity; crud; foreign matter; foreign substance; impurity substance