幼猫在几天大的时候就学会发出呼噜声了。
Kittens learn how to purr when they are a couple of days old.
他很爱玩。喜欢被人抱和会不断的发出呼噜声。
He's very playful. He loves to be carried and will purr non-stop.
发出呼噜声或许与骨骼的加固与矫正，减轻疼痛以及愈合伤口有着某种联系。
Purring may be linked to the strengthening and repairing of bones, relief of pain, and wound healing.
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