名词
中文翻译：加权平均数开关
同义词：
['weighted average switch', 'positive and negative switch']
例句：
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1. The plus-minus switch on the calculator allows you to quickly add or subtract numbers.
计算器上的正负开关允许你快速添加或减去数字。
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2. The weighted average switch is used to adjust the weights of the data points in the calculation.
加权平均数开关用于调整计算中数据点的权重。
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3. In a financial report, the plus-minus switch helps to identify the overall performance of the company.
在财务报告中，正负开关有助于识别公司的总表现。