arithmetic
/əˈrɪθmətɪk/n. 算术optics
/ˈɑːptɪks/n. the scientific study of sight and light 光学essentially
/ɪˈsenʃəli/adv. 本质上；根本上；基本上additive
/ˈædətɪv/n. 添加剂，添加物；加色法subtractive
/səb'træktɪv/n. 减色法opposite
/ˈɑːpəzət/adj. 对面的；另一边的；相反的；迥然不同的pigment
/ˈpɪɡmənt/n. 色素；颜料proportion
/prəˈpɔːrʃn/n. a part or share of a whole 部分；份额mixture
/ˈmɪkstʃər/n. 混合物subjective
/səbˈdʒektɪv/adj. 主观的creation
/kriˈeɪʃn/n. 创造，创作；产物mourning
/ˈmɔːrnɪŋ/n.
sadness that you show and feel because sb has died 伤逝；哀悼
clothes that people wear to show their sadness at sb's death 丧服bride
/braɪd/n. 新娘
bridegroom/ˈbraɪdɡruːm/n. 新郎
bride and groom 新娘和新郎symbolic
/sɪmˈbɑːlɪk/adj. 作为象征的；象征性的purity
/ˈpjʊrəti/n. 纯洁；纯净；纯粹readily
/ˈredɪli/adv.
quickly and without difficulty 快捷地；轻而易举地；便利地
in a way that shows you do not object to sth 欣然地；乐意地cleanliness
/ˈklenlinəs/n. the state of being clean or the habit of keeping things clean 清洁；干净；爱干净的习惯
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