形容词
中文翻译：持续的
同义词：
['unchanging', 'everlasting', 'perpetual例句：1. The sun is a constant source of warmth and light.（太阳是永恒的温暖和光明的来源。）']
例句：
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1. The sun is a constant source of warmth and light.
太阳是永恒的温暖和光明的来源。
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2. The river flows constantly through the valley.
这条河不断地流经山谷。
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3. The company's policy of constant innovation has been praised by many.
该公司不断创新的政策受到了许多人的赞扬。