The grasshopper eats the grass, and then gets eaten by a secondary consumer—a bluebird.

蚱蜢会吃掉青草，然后被第二级消费者——蓝知更鸟吃掉。

It was only a bluebird, but then it was the first bluebird Margery had ever seen.

它仅仅是一只蓝色知更鸟，但却是玛芝莉见到的第一只蓝色知更鸟。

A bluebird and sparrow both compete for space to build their nests.

蓝知更鸟和麻雀都在争夺筑巢空间。

One day after lunch, as he was settling down for his nap, a bluebird appeared at the mouth of the well.

一天午饭后， 当他安顿下来小睡时，一只青鸟出现在井口。

The result was a powder as brilliant as a bluebird's wing. YInMn, as it is now known, was the first new blue discovered for two centuries.

结果得到了一种像蓝知更鸟翅膀一样闪亮的粉末。现在这种颜色被称为YInMn，是两个世纪以来发现的第一种新蓝色。

He had hardly gone as far as the pump when he heard a soft, gurgling bird voice from the old apple tree in the yard, and a bluebird fluttered down almost to his feet.

他刚走到抽水机旁，就听到院子里那棵老苹果树上传来一种轻柔的、汩汩作响的鸟叫声，一只蓝知更鸟几乎飞到了他的脚上。