indicators
['ɪndɪkeɪtəz]
n.
（仪器上显示温度、压力、耗油量等的）指针( indicator的名词复数 );
指示物;
（车辆上的）转弯指示灯;
指示信号;
例句:
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Below are some key indicators of the Thatcher years.
来自BBC
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Such changes are indicators of economic dynamism.
这些变化是经济腾飞的标志。
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The economic indicators are better than expected.
经济指标比预期的好。
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It is still difficult to develop indicators for many concepts used in social science.
为社会科学领域的许多概念确立一个指标仍然很难.
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But do these indicators capture all facets of progress?
来自VOA
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So, they've always been used as indicators.
来自SA