名词
中文翻译：指示器
同义词：
['marker', 'signpost', 'indicator', 'index', 'pointer', 'identifier']
例句：
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1. The traffic light is an important indicator of the traffic flow.
交通灯是交通流量的重要指示。
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2. The new policy is a clear indicator of the government's intentions.
新政策是政府意图的明确指示。
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3. The company's stock price is an important indicator of its financial health.
公司的股价是其财务状况的重要指示。