名词
中文翻译：积极信号
同义词：
['positive peak', 'positive surge']
例句：
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1.The stock market experienced a positive spike in investor sentiment this morning.
今天早上股市投资者情绪出现了积极波动。
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2. The company's performance has been on a positive spike since the new CEO took office.
自从新任CEO上任以来，公司的业绩一直呈上升趋势。
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3.The positive spike in sales is likely due to the introduction of a new product line.
销售额的积极增长很可能是由于推出了新产品线。