Any of several Old World birds of the genus Vanellus related to the plovers, especially V. vanellus, having a narrow crest and erratic flight behavior.

麦鸡东方田凫属禽类，属?鸟类，尤指田凫类，有狭窄的颈冠、飞行动作缓慢且不规则。

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"Biologically, fight-or-flight behavior has two distinct stages, " the researchers wrote. "The short-term response [is] a surge in adrenaline production.

研究人员写道，“短期的回应[是]肾上腺激增。

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Think of each of these as a trigger: an event, a behavior, or a circumstance that prompts negative emotions - and more specifically, the experience of fight or flight.

这些事件，行为或情形都会引发负面情绪，更明确的说，一种“战还是逃”的经历。

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The company has to conduct battery- and insulation-related pre-flight inspections, watch battery behavior like a hawk, use only its own pilots and fly over unpopulated areas.

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There was, for example, the suspicious incident on a Northwest Airlines flight from Detroit to Los Angeles during which a group of 14 Syrian musicians indulged in several hours of bizarre behavior that passengers and members of the flight crew suspected was terrorism-related.

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Indeed, market behavior has been like a flight to quality.

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