名词
中文翻译：缓慢的羽毛化
同义词：
['slow feathering', 'slow plumage', 'slow feather growth']
例句：
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1. The bird's slow feathering is a sign of its maturity.
这只鸟缓慢的羽毛生长是它成熟的象征。
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2.The baby bird's slow feathering is a testament to its development.
这只小鸟缓慢的羽毛生长证明了它的成长。
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3. As the bird grew, its feathering became more rapid and colorful.
随着这只鸟的成长，它的羽毛生长得更快且色彩更丰富。