The penguin is a flightless bird.

企鹅是一种会飞的鸟。

Hesperornis is an extinct genus of flightless aquatic birds that lived during the Late Cretaceous.

黄昏鸟是一种已经灭绝的会飞翔的水鸟，生活在白垩纪晚期。

In some species, such as aphids, the flightless morph lacks wings and is called the apterous morph.

一些种类，如蚜，无翅个体，被称为无翅型。

The penguin is a flightless bird.

企鹅是一种不会飞的鸟。

Hesperornis is an extinct genus of flightless aquatic birds that lived during the Late Cretaceous.

黄昏鸟是一种已经灭绝的不会飞翔的水鸟，生活纪晚期。

In some species, such as aphids, the flightless morph lacks wings and is called the apterous morph.

一些昆虫种类，如蚜虫，出现无翅个体，被称为无翅型。

The penguin is a flightless bird.

企鹅是一种飞。

Hesperornis is an extinct genus of flightless aquatic birds that lived during the Late Cretaceous.

黄昏是一种已经灭绝飞翔水，生活在白垩纪晚期。

In some species, such as aphids, the flightless morph lacks wings and is called the apterous morph.

一些昆虫种类，如蚜虫，出现无翅个体，被称为无翅型。

The penguin is a flightless bird.

企鹅是一种不会飞的。

Hesperornis is an extinct genus of flightless aquatic birds that lived during the Late Cretaceous.

黄昏是一种已经灭绝的不会飞翔的水，生活在白垩纪晚期。

In some species, such as aphids, the flightless morph lacks wings and is called the apterous morph.

一些昆虫种类，如蚜虫，出现无，被称为无型。

The penguin is a flightless bird.

企鹅是种不会飞的鸟。

Hesperornis is an extinct genus of flightless aquatic birds that lived during the Late Cretaceous.

黄昏鸟是种已经灭绝的不会飞翔的水鸟，生活在白垩纪。

In some species, such as aphids, the flightless morph lacks wings and is called the apterous morph.

些昆虫种类，如蚜虫，出现无翅个体，被称为无翅型。

The penguin is a flightless bird.

企鹅是一种不会飞的鸟。

Hesperornis is an extinct genus of flightless aquatic birds that lived during the Late Cretaceous.

黄昏鸟是一种已经灭绝的不会飞翔的水鸟，生活在白垩纪晚期。

In some species, such as aphids, the flightless morph lacks wings and is called the apterous morph.

一些昆虫种类，如蚜虫，出现无翅个体，无翅型。

The penguin is a flightless bird.

企鹅是一种不会鸟。

Hesperornis is an extinct genus of flightless aquatic birds that lived during the Late Cretaceous.

黄昏鸟是一种已经灭绝不会水鸟，生活在白垩纪晚期。

In some species, such as aphids, the flightless morph lacks wings and is called the apterous morph.

一些昆虫种类，如蚜虫，出现无翅个体，被称为无翅型。

The penguin is a flightless bird.

企鹅是一不会飞的鸟。

Hesperornis is an extinct genus of flightless aquatic birds that lived during the Late Cretaceous.

黄昏鸟是一已经灭绝的不会飞翔的水鸟，生活在白垩纪晚期。

In some species, such as aphids, the flightless morph lacks wings and is called the apterous morph.

一些类，如蚜，出现无翅个体，被称为无翅型。

The penguin is a flightless bird.

企鹅是一种不会飞的鸟。

Hesperornis is an extinct genus of flightless aquatic birds that lived during the Late Cretaceous.

黄昏鸟是一种已经灭绝的不会飞翔的水鸟，生活在白垩纪晚期。

In some species, such as aphids, the flightless morph lacks wings and is called the apterous morph.

一些种类，如蚜，翅个体，被称为翅型。