名词
中文翻译：信号
同义词：
['notice', 'indication', 'indicator']
例句：
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1.The signal from the satellite was clear enough to be heard over the noise of the traffic.
卫星发出的信号足够清晰，足以在交通噪音中被听到。
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2. The new policy is a clear signal that the government is committed to environmental protection.
新政策是政府致力于环境保护的明确信号。
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3. The sudden drop in stock prices was a strong signal that the company's financial health was in jeopardy.
股票价格的突然下跌是一个强烈的信号，表明公司的财务状况岌岌可危。