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+ 配額 配额 [pei4 e2] /quota/ration/

+ 酒精中毒 酒精中毒 [jiu3 jing1 zhong4 du2] /alcoholism/

+ 醇酸 醇酸 [chun2 suan1] /alkyd/alcohol acid/hydroxyacid/

+ 醇酸樹脂 醇酸树脂 [chun2 suan1 shu4 zhi1] /alkyd resin/

+ 聚酯樹脂 聚酯树脂 [ju4 zhi3 shu4 zhi1] /polyester resin/

+ 金剛石 金刚石 [jin1 gang1 shi2] /diamond/also called 鑽石|钻石[zuan4 shi2]/

+ 研磨材料 研磨材料 [yan2 mo2 cai2 liao4] /abrasive/grinding material/

+ 鑽頭 钻头 [zuan1 tou2] /drill bit/

+ 拉絲模 拉丝模 [la1 si1 mo2] /die (i.e. tool for cutting wire to a given diameter)/

+ 金剛砂 金刚砂 [jin1 gang1 sha1] /carborundum/emery/

+ 防患 防患 [fang2 huan4] /preventative measures/to guard against accident or disaster/

+ 防患未萌 防患未萌 [fang2 huan4 wei4 meng2] /to prevent a disaster before the event (成语 saw); to nip sth in the bud/

+ 防患未然 防患未然 [fang2 huan4 wei4 ran2] /to prevent a disaster before the event (成语 saw); to nip sth in the bud/

+ 陰雲 阴云 [yin1 yun2] /dark cloud/

+ 隕坑 陨坑 [yun3 keng1] /meteorite crater/

+ 雅皮士 雅皮士 [ya3 pi2 shi4] /yuppie (transl.)/young urban professional, 1980s slang/

+ 集體墳墓 集体坟墓 [ji2 ti3 fen2 mu4] /mass grave/

+ 集合論 集合论 [ji2 he2 lun4] /set theory (math.)/

+ 康託爾 康托尔 [Kang1 tuo1 er3] /Cantor (name)/Georg Cantor (1845-1918), German mathematician, founder of set theory 集合論|集合论[ji2 he2 lun4]/

+ 彫琢 雕琢 [diao1 zhuo2] /to sculpt/to carve (jade)/ornate artwork/overly elaborate prose/

+ 雙射 双射 [shuang1 she4] /bijection/one-to-one map (math.)/

+ 雙層公共汽車 双层公共汽车 [shuang1 ceng2 gong1 gong4 qi4 che1] /double decker bus/

+ 雙層巴士 双层巴士 [shuang1 ceng2 ba1 shi5] /double decker bus/