单词	pyrophosphoric acid
释义	pyrophosphoric acid /ˌpʌɪrə(ʊ)fɒsˈfɒrɪk / noun [mass noun] Chemistry A glassy solid obtained by heating phosphoric acid. A tetrabasic acid; chemical formula: H4P2O7. Pyrophosphoric acid is colorless, odorless, hygroscopic and is soluble in water.
随便看	encopresis encore encounter encounter group encourage encouragement encourager encouraging encouragingly encroach encroacher encroachment en croute encrust encrustation encrypt encryption enculturation encumber encumbrance -ency encyc. encycl. encyclical encyclopaedia

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