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The wings of the chicken have become vestigial; it can no longer fly.
鸡的翅膀逐渐退化，不会在空中飞行了。
《新英汉大辞典》
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It is no longer a question whether man can fly to the moon.
人能否飞上月球，现在已不再是什么问题了。
youdao
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It is no longer a question whether man can fly to the moon.
人能否飞上月球，现在已不再是什么问题了。
youdao