例文
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- There are more than 25 species of warblers, including the rare cerulean warbler.
- Along River Road, cerulean warblers, rare elsewhere in the state, are virtually guaranteed.
- Current research focuses on the threatened map turtles and declining populations of cerulean warblers.
- So much for the brook trout or the cerulean warbler.
- Listen carefully : Is that the song of a cerulean warbler outside your window?