形容词
中文翻译：持续的
同义词：
['unchanging', 'unvarying', 'constant例句：1. The temperature is constant throughout the day.（温度在整个一天中保持不变。）']
例句：
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1. The temperature is constant throughout the day.
温度在整个一天中保持不变。
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2. The sun's light is constant throughout the year.
太阳的光全年都不变。
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3. The river flows steadily, a constant reminder of nature's power.
河流平稳地流动，是大自然力量的恒久提醒。