| Like a canary in a coal mine, the biochip will detect hazards, including biochemical threats. |
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| In a sense, one could think of journalists as equivalent to a canary in a coal mine. |
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| Springs are a very good canary in a coal mine because they pull water off the top of the aquifer. |
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| To a certain extent, between MP3.com and Napster, digital music has become the canary in a coal mine in terms of privacy issues and business models. |
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| The prison guards are the canary in a coal mine of California politics. |
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| We are a little bit concerned as if it was a canary in a coal mine. |
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