場景開始時，他們彼此交談，但聲音很小，沒有人能聽到。

場景開始時，他們彼此交談，但聲音很小，沒有人能聽到。

Results (English) 1:

As the scene begins, they talk to each other, but the voices are so low that no one can hear them.

Results (English) 2:

At the beginning of the scene, they talked to each other, but the voice was so low that no one could hear them.

Results (English) 3:

At the beginning of the scene, they talk to each other, but the sound is so small that no one can hear it.