The exclamation was always followed by an undefinable look cast upon him in return by the old servant.

一声惊呼之后，总用一种难以形容的目光回敬他。

At that moment, I was grateful for music itself, for the sheer existence of this elusive, undefinable phenomenon that seems to ignore our brains and go straight to our hearts.

那一刻，我谢音乐本身，谢这种难以捉摸、无法定义的现象的存在， 它似乎无视我们的大脑， 直达我们的内心。

The longing was with him day and night, an incessant undefinable craving, like the sudden whim of a sick man for food or drink once tasted and long since forgotten.

这种渴望日日夜夜伴随着他， 一种持续不断的无法形容的渴望，就像一个病突然心血来潮想要吃过一次但早已忘记的食物或饮料。

The undefinable sense we were speaking of is a ticklish instrument, easily thrown out of gear by a sudden fall of temperature; and the sharpest experts grow shy and self-distrustful when the cold current of depreciation touches them.

我们所说的无法定义的一种怕痒的工具，很容易因温度的突然下降而失灵；当贬值的寒流触及他们时，最敏锐的专家会变得害羞和不自信。

It was only within a week that she had felt in him the undefinable change that made her restless in his absence, and as tongue-tied in his presence as though it were she who had a secret to keep from him!

仅仅在一周之内，她就到他身上发生了无法形容的变化，这种变化让她在他不在的时候焦躁不安，在他面前张口结舌，好像她有什么秘密要瞒着他似的！