名词
中文翻译：交叉添加
同义词：
['cross-addition', 'cross-subtraction']
例句：
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1.The engineer made a cross addition to the design to improve efficiency.
工程师在设计中做了交叉添加以提高效率。
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2. In mathematics, cross addition is used to solve equations involving multiple variables.
在数学中，交叉添加用于解决涉及多个变量的方程。
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3. During the construction phase, cross addition was used to ensure structural integrity.
在施工阶段，交叉添加被用来确保结构的完整性。