They defend their territories from other antbirds by singing complex duets to signal their combined strength.

它们通过复杂的鸣声二重奏来显示其合作的强大，以此捍卫领地不受其他蚁鸟的侵犯。

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Singing demands neurological sophistication and physical stamina and is thus a good signal of what fine mates (and bad opponents) they would make.

鸟儿的鸣叫需要复杂的神经系统和良好体力的配合，因而能很好地显示出它们会是多么优秀的配偶（强有力的竞争对手）。

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LIKE many people, birds sing to show off. Singing demands neurological sophistication and physical stamina and is thus a good signal of what fine mates (and bad opponents) they would make.

跟很多人一样，鸟用鸣叫来炫耀自己。鸟儿的鸣叫需要复杂的神经系统和良好体力的配合，因而能很好地显示出它们会是多么优秀的配偶(强有力的竞争对手)。

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With the lights still, off the US star appeared on stage under a signal spotlight singing Hey You.

BBC: Snoop Dogg

Barry Cheetham, senior lecturer in The School of Computer Science at the University of Manchester, is combining his academic expertise in communications, networks and digital signal processing with his love of choral singing.

CNN: Musicians aim to create virtual choir