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TL 汉语翻译【计】 目标语言, 测试语言 英语解释：名词 tl:- a soft grey malleable metallic element that resembles tin but discolors on exposure to air; it is highly toxic and is used in rodent and insect poisons; occurs in zinc blende and some iron ores
同义词：thallium, atomic number 81
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