Any of several Old World birds of the genus Vanellus related to the plovers, especially V. vanellus, having a narrow crest and erratic flightbehavior.
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。
2
"Biologically, fight-or-flightbehavior 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。
3
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.