please excuse my dear Aunt Sally
短语释义与例句
phr.
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1.
A mnemonic used to help people remember the order of operations, in the PEMDAS order.
数学
词源
Ultimately from PEMDAS.
来源：wiktionary
A mnemonic used to help people remember the order of operations, in the PEMDAS order.
Ultimately from PEMDAS.
来源：wiktionary