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词汇 caesium
释义

caesium

noun
/ˈsiːziəm/
/ˈsiːziəm/
(British English)
(North American English cesium)
[uncountable]
(symbol Cs)
  1. a chemical element. Caesium is a soft silver-white metal that reacts strongly in water, used in photoelectric cells.
    词源mid 19th cent.: from Latin caesius ‘greyish-blue’ (because it has characteristic lines in the blue part of the spectrum).
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