lǐ / xiǎng / qíng / kuàng / xià / jiǎn / xié / bō / de / tú / xiàng / chéng / xiàn / guī / zé / de / zhèng / xián / qū / xiàn

理想情况下，简谐波的图像呈现规则的正弦曲线。

Under ideal conditions, a simple harmonic wave appears as a regular sine curve.