Freonn.
英 'friːɒn | 美 'friɑn
中文n. 二氯二氟代甲烷；氟里昂
词根词源
Freon (n.)1932, proprietary name in U.S. for fluorocarbons used in refrigeration technology. "The name was apparently constructed from fre(eze) + -on used as an arbitrary suffix" [Flood].
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