噪鹃是热带的一种布谷鸟，它潜伏在灌木丛中，发出有节奏的似狼叫声。
The koel, a tropical cuckoo that lurks in thick cover, has a rising bisyllabic wolf-whistle.
狼的叫声分为四类：狂吠，呜咽，嚎叫和咆哮。
Wolves' vocalizations can be separated into four categories: barking, whimpering, growling, and howling.
大多数狼都有自己的领土，它们通过肢体语言，嚎叫声，以及嗅觉进行交流。
Most wolves hold territories, and all communicate through body language, vocalization and scent marking.
但是狗是从狼进化而来的，那么，狗的这种吠叫声是从何而来的呢？
And dogs evolved from wolves. So where did the bark come in?
嚎叫声是让相邻的狼离开的警告。
The howl is a clear warning to neighboring wolves to stay away.
狼也会发出混合的叫声像咆哮狂吠，呜咽的吠叫。
Sounds created by the Wolf may actually be a combination of sounds such as a bark-howl or growl-bark.
我们可以听到远处狼的嚎叫声。
“猫的叫声真让人发抖。”狼从门缝里递给狐狸一支烟。
"The cry of the cat really makes people shiver." the Wolf from the door to the fox a cigarette.
狼发出哀叫声。
除了有狼，鲸鱼的叫声，还有来自全世界数种青蛙的叫声，南美一些鸟类遗迹北美猫头鹰的叫声。
In addition to the Wolf and the whale, there are ringtones from several species of frogs from around the world, a few South American birds and North American owls.
你能发出狼的叫声吗？
你能发出狼的叫声吗？
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