1.Recordings of the low grunts of a vervet who spotted an eagle led other vervets to look up into the sky; recordings of the high-pitched chutters emitted by a vervet upon noticing a python caused them to scan the ground.
一只黑颚
一只老鹰时
出低沉的咕哝声,记录
其他
黑颚
抬头仰望天空的声
。
黑颚
在注意到蟒蛇时
出高
调的叫声,记录了它们扫描地面的情况。机翻