系指基本扣除额basic: Basic = Basic English. standard: n. 1.标准,水准,规格,模范。 2.旗;军旗,队旗; ...deduction: n. 1.扣除,折扣。 2.扣除额,折扣额。 3.推论, ...standard deduction: 标准扣除额; 标准扣税; 扣除额additional standard deduction: 与额外扣除额下载手机词典可随时随地查词查翻译