英语语法分析

Dr. McGowan and Dr. Marzluff believe that this ability gives crows and their brethren an evolutionary edge.

麦高文和马兹卢夫博士相信，这种能力赋予了乌鸦和它的弟兄们进化的优势。

McGowan could not say whether the female teacher drank the tainted liquid. He did say the teacher was not harmed.

麦高文未能说明那个女老师是否喝了染毒液体，但他确实说了那个女老师未受到伤害。

And "crows are very observant birds," adds Kevin McGowan, an ecologist at the Cornell Laboratory of Ornithology who has studied crows for decades.

同时“乌鸦是非常细心的鸟，”Kevin McGowan(康奈尔鸟类学实验室的生态学家，他研究了乌鸦十几年)补充道。