He came upon a valley where rock ptarmigan rose on whirring wings from the ledges and muskegs.
他走到了一个山谷，那儿有许多松鸡从岩石和沼地里呼呼地拍着翅膀飞起来。
He came upon a valley where rock ptarmigan rose on whirring wings from the ledges and muskegs. Ker - ker - ker was the cry they made.
他走上一个山谷，松鸡在岩石和沼地间呼呼地拍着翅膀穿梭，发出“咯-咯-咯”的叫声。
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