The basic principle of double entry bookkeeping is that every transaction has a twofold effect.
复式记账法的基本原理是每笔交易都有借贷双方。
Thee basic principle of double entry bookkeeping is that every transaction has a twofold effect.
复式记账法的基本原理是每笔交易都有借贷双方。
This paper introduces the principle and typical operational modes of double effect distillation, and discusses its selection and application.
介绍了双效精馏的原理和几种典型的操作方式，阐明了双效精馏的选择依据和应用原则。
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