A bird is singing in the tree

一只小鸟───a bird

At one point a bird trilled in the conservatory.───在某一刻，一只鸟儿在温室里唧啾啼叫。

A bird had pecked a hole in the sack.───一只鸟把袋子啄了个洞。

There was a bird perched on the roof.───有一只鸟落在屋顶上。

Had the French inventor tried to model his plane on every detail of a bird's wing, he would not have succeeded in flying it.───要是那个法国发明家力图模仿鸟翼的每个细节来造他的飞机的话，他就不会使它飞起来。（虚拟条件）

(of a bird or other animal) move by jumping with two or all feet at once.───（鸟或别的动物）齐足跳，跳跃

Every time I saw them, I would get a strong feeling that I would like to be a bird, flying together with them.───每当看到它们，也会想变成一只鸟，同它们一起飞翔。

While the procession passed, the child was uneasy, fluttering up and down, like a bird on the point of taking flight.───当游行队伍走过时，珠儿就象一只跃跃欲飞的鸟儿一般不安地跳起又落下。

In a typical cuckoo clock, a bird is pushed out the door by a folding ladder and does not move its body.───在普通的布谷鸟钟表上面，一只小鸟会被折叠梯推出门来，小鸟的身体不会移动。

A great lightning and thunder ensued, and a man with the body of a bird shot dead the leader of the Miao.───伟大的闪电和雷声随后，一名男子的身体，禽流枪杀的领导人苗。

A bird may be known by its song. 

A bird in the hand is worth two in the bush. 

Time is a bird for ever on the wing. 

A bird has just flown by.

A bird preened its feathers.

A bird is known by its note, and a man by his talk. 

A bird is soaring into the sky.

Tammy eats like a bird.

A bird had pecked a hole in the sack.