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

一声惊呼之后，老仆人总是用一种难以形容目光回敬他。

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，感谢音乐本身，感谢这种难以捉摸、无法定义现象存在， 它似乎无视大脑， 直达内心。

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.

这种夜夜伴随着他， 一种持续不断无法形容，就像一个病人突然心血来潮想要吃过一次但早已忘记食物或饮料。

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.

所说无法定义感觉是一种怕痒工具，很容易因温度突然下降而失灵；当贬值寒流触及他时，最敏锐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，她就感觉到他身上发生了无法形容变化，这种变化让她在他不在时候焦躁不安，在他面前张口结舌，好像她有什么秘密要瞒着他似！