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同义词： Cygnus olor
以上来源于: WordNet
N a Eurasian swan, Cygnus olor, with a pure white plumage, an orange-red bill with a black base, and a curved neck 白天鹅 → compare whistling swan
As their name suggests, mute swans are usually silent, limited by a straight trachea.
顾名思义，因其直气管所限，哑天鹅大多数时候都保持安静。
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Brooding skies cast a lavender glow on a flock of mute swans gliding across a crag-ringed loch in Edinburgh, Scotland.
在苏格兰的爱丁堡，淡紫色的天空下，一群哑天鹅在群山环绕的湖面上静静地划过。
Swans are protected birds and the Crown retains the right to ownership of all unmarked mute swans in open water.
BBC: Swan body parts found along Lincoln canal
One was subsequently charged with the killing of eight mute swans.
BBC: The family of swans days before they were killed
These include mute swans, little grebes, redshanks, sedge warblers and whitethroats.
BBC: Siddick Ponds nature reserve damaged by fire
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