您可以通过添加列和行、包括其他来源的数据、创建用于计算的公式等，从而操作工作表。
You can manipulate the worksheet by adding columns and rows, including data from other sources, creating formulas for computations, and so on.
根据基本的质量守恒定律、能量守恒定律以及一些经验公式等建立了系统的动态数学模型。
Based on the mass conservation law, the energy conservation law and some empirical equations, the dynamic model is built.
其特点是通过词语、句式、修辞手法、篇章结构、标点符号、图表公式等因素的具体运用体现出来的。
Its main characteristics are reflected by the concrete use or arrangement of words, syntax, rhetorical devices, discourse structure, punctuation marks, graphs and formulae, etc.
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