单词	pi electron
释义	pi electron noun : an electron involved in a pi bond Word History First Known Use 1950, in the meaning defined above
随便看	Cheddar pink cheddars cheddite cheddites cheder cheders chedites Cheduba chee-chee cheeba cheecha cheechako cheechakoes cheechakos cheek cheek by jowl cheek knee cheek pouch cheek strap cheek to cheek cheek tooth cheekbone cheekbones cheeked cheeker

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