形容词
中文翻译：固定的
同义词：
['constant', 'unchanging']
例句：
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1.The law of gravity states that objects falltowards the center of the Earth.
万有引力定律表明物体会向地球中心下落。
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2. The law of thermodynamics tellsus that heat cannot be created or destroyed.
热力学第一定律告诉我们热量不能被创造或销毁。
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3. The law of conservation ofenergy states that energy cannot be created ordestroyed.
能量守恒定律告诉我们能量不能被创造或销毁。