sine curve

例句：

1. 1.The sinusoidal curve of the sun's position is a crucial factor in determining its daily movement.
   太阳位置的正弦曲线是决定其每日移动的关键因素。
2. 2.The sinusoidal curve of the earth's rotation has been studied extensively to understand its effects on climate.
   地球自转的正弦曲线被广泛研究，以了解其对气候的影响。
3. 3.In the study of sound waves, scientists use mathematical models to simulate the sinusoidal curves of different frequencies.
   在声音波研究中，科学家们使用数学模型来模拟不同频率的正弦曲线。