英语翻译mike found that young brids raised in isolation could on
英语翻译
mike found that young brids raised in isolation could only make some simple sound .mike learned that a young brid has to hear other ole brid"ssong duringthe period before ti is seven weeks old .
mike found that young brids raised in isolation could only make some simple sound .mike learned that a young brid has to hear other ole brid"ssong duringthe period before ti is seven weeks old .
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