inaudible

1.an inaudible conversation.

听不到的谈话

2.His voice was almost inaudible.

几乎听不见他的音。

3.inaudible pulses of high-frequency sound.

听不见的高频音脉冲。

4.7.Dr. Blix has quipped that, quote, ``Mustard gas is not (inaudible) You are supposed to know what you did with it. '

布利克斯博士曾一语双关地说“芥子气是闻不到的，你只有用它才会知道它。”