形容词
中文翻译：恒定的
同义词：
['steady', 'permanent例句：1. The temperature is constant throughout the day.（温度在整个白天都是恒定的。）']
例句：
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1. The temperature is constant throughout the day.
温度在整个白天都是恒定的。
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2.The river flows steadily through the valley.
这条河平稳地流过山谷。
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3.The sun's rays are constant throughout the year.
太阳的光线全年都恒定不变。