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Like all birds , roosters sing or crow in a daily cycle .

与所有的鸟类一样，公鸡高歌（或叫打鸣）是遵循每日之循环的。

Children playing with their roosters .

孩子们在逗公鸡玩。

Working with feral fowl in sweden , the scientists found that many matings were forced , as the roosters are twice the size of the hens .

在瑞典研究野生禽类时，科学家发现许多交配是被强制的，因为公鸡的体积是母鸡的两倍。

The heat and lorries , combined with those morning roosters , did all they could to deprive me of my much needed sleep - again !

天气炎热，卡车的噪音再加上报晓的公鸡又一次剥夺了我迫切需要的睡眠。