剑桥词典a large Australian bird with a long neck and grey or brown feathers . Emus cannot fly but have long legs and can run quickly . （产于澳大利亚的）鸸鹋 Emus grow to almost two metres and can run at nearly 50 kph . 鸸鹋可以长到差不多两米高，奔跑时速几乎可达50公里。 返回 emu