形容词
中文翻译：持续的
同义词：
['unchanging', 'everlasting', 'perpetual例句：1. The sun isconstant in its brightness throughout the day.（太阳在一天中始终保持其亮度。）']
例句：
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1. The sun isconstant in its brightness throughout the day.
太阳在一天中始终保持其亮度。
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2. Theriver flows constantly, never stopping.
河流不断流动，从未停歇。
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3. The weatheris constant, with no sudden changes.
天气保持不变，没有突然的变化。