为了便于计算对易子，我们列出一些恒等式。
To facilitate the calculation of commutators, we list identities.
利用动力学等价关系导出了便于计算的表达式。
Here, the kinetic equivalent relationship is resorted to derive the expression convenient for computation.
为了便于计算，他将这个份额定为每天1,000个词。
Simply for ease of accounting, he puts that number at 1,000 words per day.
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