biologists?estimate?that as?many?as?2 million lesser?prairie?chickens—a kind of?bird living on?stretching?grasslands—once?lent?red?to?the often gray?landscape?of?the mid-western and southwestern united?states.（2016年英二第二篇）a of b ??b的a
biologists/ [ba???l?d??sts/n.生物学家
estimate / ?estim?t / v.估计；估算
prairie?/ ?pre?ri / n.北美草原?

stretch / stret? / v.延伸；绵延
lend sth. to sth. 借钱给 ?给……添加，增添(某种特色或特性)
landscape / ?l?ndskeip / n.风景；景色
grasslands/?grɑsl?ndz/n. 草原; 草地; 草场
生物学家估计有两百万只更小的草原松鸡——一种栖息于绵延草地的鸟类——曾经给美国中西部和西南部常年灰暗的景象添加了一抹红色。