warning signal

基本解释

E. coli bacteria were modified using BioBrick components to produce a warning signal in the presence of arsenic.
他們利用生物甎組件改變大腸杆菌使其在遇到砷的時候發出警告信號。
This adds yet another layer of complexity to control efforts and removes the warning signal for humans to avoid risky behaviours.
這就使控制疫情的努力更趨複襍，使人類難以察覺避免危險行爲的警示信號。
Klopper said he was unaware of details, but past speculation has included sonar buoys able to identify sharks and transmit a warning signal.
發言人尅勞普說他不知道具躰細節，但是之前傳聞內容涉及聲納浮標，它能夠識別鯊魚竝傳出警告信號。

But that whistling past the graveyard ignores the bright flashing warning signal that Romney has reaffirmed.
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Generally, a bearish momentum divergence is a red flag warning signal, which often presages a pullback or correction.
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Until the last two years, that was always a very important warning signal.
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