"Poor little Danish grey-bird," said the Canary; "you have been caught too."
“可怜的小丹麦灰鸟,”金丝雀说,“你也被困住了。”
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Like the proverbial canary in a coal mine, the nearly 10, 000 known bird species act as "environmental barometers" whose populations can appraise the greater well-being of their habitats.