一项新研究发现：狗能够通过狗叫声来辨别出另一只狗的大小。
Dogs are able to tell how big another dog is just by listening to its growl, a new study has found.
国王知道了新的鸟叫声。
亚马逊流域发现了一种叫声像猫、外形像(爱尔兰传说中的)矮妖精的新伶猴。
A new species of titi monkey that purrs like a cat and looks like a leprechaun has been discovered in the Amazon basin.
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