flightless

adj.不能飞的

（指鸟类）不能飞的

形容词

1. Penguins are flightless birds that are adapted to life in the water.
企鹅是一种不能飞的鸟，适应了水中的生活。

2. The dodo bird was a flightless species that went extinct in the 17th century.
渡渡鸟是一种在17世纪灭绝的不能飞的物种。