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单词
pH
释义
pH
NOUN
/
SCIENCE
/ˌpiː ˈeɪtʃ/
a number from 0 to 14 that describes how acid or alkaline a substance is 酸碱度;pH值
Most unpolluted rainwater has a pH of around 5.0.
大部分未受污染的雨水酸碱度为5.0左右。