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例子
The breeze undulated the pond's surface, making the sun's reflection dance.
The boat's movement undulated the canal's serene waters, disturbing the reflections.
The children loved to throw pebbles into the lake to undulate the calm surface.
The waves of the ocean undulated in a rhythmic sound, lulling the beachgoers into relaxation.
The singer's voice undulated, creating an enchanting melody that captivated the audience.
