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词汇 thallium
释义

thallium

noun
/ˈθæliəm/
/ˈθæliəm/
[uncountable]
(symbol Tl)
  1. a chemical element. Thallium is a soft silver-white metal whose compounds are very poisonous.
    词源mid 19th cent.: modern Latin, from Greek thallos ‘green shoot’, because of the green line in its spectrum.
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