名词
中文翻译：青年的羽毛
同义词：
['youthful plumage', "juvenile plumage例句：1. The young birds are displaying their juvenal plumage in the park.（公园里，年轻的鸟儿正在展示它们的青年羽毛。）2. The researcher observed the behavior of various species to understand their juvenal plumage.（研究员观察了各种物种的行为，以了解它们的青年羽毛。）3. The bird's juvenal plumage is a key indicator of its age and health.（鸟的青年羽毛是判断其年龄和健康状况的关键指标。）"]
例句：
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1. The young birds are displaying their juvenal plumage in the park.
公园里，年轻的鸟儿正在展示它们的青年羽毛。
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2. The researcher observed the behavior of various species to understand their juvenal plumage.
研究员观察了各种物种的行为，以了解它们的青年羽毛。
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3. The bird's juvenal plumage is a key indicator of its age and health.
鸟的青年羽毛是判断其年龄和健康状况的关键指标。