Yet, imperceptible to the human eye.

然而肉眼却无法看见它。

However, the cold weather seems to be imperceptible to winter swimming enthusiasts.

然而寒冷的天气并没有冷却冬泳爱好者们的热情。

I bowed to him. He gave me an almost imperceptible bow in return, without saying a word to me.

我向他行个礼。他回答我个礼，这是种差不多看不出来的礼，句话也没有说。

But inexorably, every thirty seconds, the minute hand of the electric clock above his bed jumped forward with an almost imperceptible click.

但无可改变的是，他床头电钟的分外每三十秒就要发出几乎听不见的“”，跳前步。

Studies show the use of antiretroviral drugs dramatically reduces the risk of HIV transmission by lowering the amount of virus to near imperceptible levels.

研究表明使用抗逆转录药物能将病毒量低到几乎无法觉察的水平，从而极大地低艾滋病毒传播的。

Less than a decade after his dissertation, newspapers were falsely insisting that experiments could prove sweetness was imperceptible on the back of the tongue.

他的学位论文发表后不到十年，报纸已经在错误地坚称，实验能够证明舌根完全感受不到甜味。

The short answer: new accents begin to develop when isolated groups of speakers start making nearly imperceptible changes to the way they pronounce words.

当孤立的说话者群体开始对他们的发音方式进行几乎不可察觉的改变时，新口音就会开始形成。

As it went down, slipping lightly through the old man's fingers, he still could feel the great weight, though the pressure of his thumb and finger were almost imperceptible.

它从老人的指间轻轻地滑下去的时候，他依旧感到很大的分量，尽管他的大拇指和食指施加的压力简直小得觉察不到。

The flickering is so slight that it is imperceptible to the human eye, but the camera on another phone can detect it at a distance of up to ten metres.

这样的闪光很微弱，人眼无法感知，但另部手机的摄像头能够在十米的范围内检测得到。

Constant use and pure concentration may have enabled doctors in TCM to develop this power to such an extent that they can tell many things imperceptible to the average people.

不断地运用和专可能使中医发展这种力量，以至于他们可以告诉许多般人无法察觉的事情。

" Can you hear me" ? Dad said. He repeated this several times. Eventually, in a movement so small it was almost imperceptible, I saw the tip of Mother's ponytail dip as she nodded.

" 你能听见我说话吗？" 爸爸说，他重复问了好几次。最后，我看到母亲的马尾辫梢微微动了动，似乎是微微点了点头，但动作轻得几乎觉察不到。

Then she began to groan, faintly at first. Her shoulders were shaken by a strong shuddering, and she was growing paler than the sheets in which her clenched fingers buried themselves. Her unequal pulse was now almost imperceptible.

接着，她就开始呻吟，起初音微弱。 后来肩膀发抖，脸比床单还白，蜷缩的手指紧抠住被子。 她的脉搏不匀，现在几乎感觉不到了。