cis-
英
[sɪs]
美
[sɪs]
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名词 cis:
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an alliance made up of states that had been Soviet Socialist Republics in the Soviet Union prior to its dissolution in Dec 1991
名词 ci:
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a unit of radioactivity equal to the amount of a radioactive isotope that decays at the rate of 37,000,000,000 disintegrations per second
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