吼叫声：某些动物的吼叫或吠声，如发情期的鹿或正在追猎中的小猎兔犬。
Bell: the Bellowing or baying cry of certain animals, such as a deer in rut or a beagle on the hunt.
在发情期或直接接触时，大熊猫通过发出不同频率的吱吱叫、嗥叫、吼叫、咩叫声等，表达厌恶、亲近、喜欢等各种情感。
During oestrus or direct contact, panda show their likes or dislikes, their intimate through different frequencies of clicks, howls, roars, and baas.
在发情期或直接接触时，大熊猫通过发出不同频率的吱吱叫、嗥叫、吼叫、咩叫声等，表达厌恶、亲近、喜欢等各种情感。
During oestrus or direct contact, panda show their likes or dislikes, their intimate through different frequencies of clicks, howls, roars, and baas.
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