Yet, imperceptible to the human eye.

然而肉眼却无法看见它。

Things like Wi-Fi are invisible to the human eye.

但肉眼是无法看见 WiFi 这类东西的。

The human eye can distinguish one thousand different shades of color.

肉眼能分辨出一千种不同的色调。

No human eye had ever seen a hound like this one.

任何人都未见过与此类似的猎犬。

There are three types of cone cell in the human eye.

人眼有三种视锥细胞。

It all starts here, with a bacteria invisible to the human eye.

一切都始于这里，一个人眼看不见的细菌。

They live in the same range and are indistinguishable to the human eye.

它们生活在同一范围内，肉眼难以分辨。

She explained that the human eye has two distinct regions for seeing the world.

她解释说，人类的眼睛有两个不同的区域来观察世界。

Infrared waves are electromagnetic energy that cannot be seen with the human eye.

红外线是肉眼看不到的电磁波。

The device collects infrared waves --electromagnetic energy that cannot be seen with the human eye.

该设备收集红外线波——肉眼无法看到的电磁能量。

For one thing, it's only half the time of a human eye blink.

一方面，这只是人类眨眼时间的一半。

The result, if the surface is transparent, looks to a human eye like fog.

因此，如果凝结水滴的表面是透明的，在人眼看来就像是形成了雾。

Until it becomes so long that the human eye can't see it anymore.

直到光波变得足够长，使得人眼再也无法看见这些恒星。

But human eyes excel in other ways. They are in fact remarkably discerning in color gradation.

然而，人眼在其它方面有优越之处。事实上，人眼对颜色梯度具有非凡的分辨能力。

The smallest known spider, and the smallest known insect are barely visible to the human eye.

目前已知的最小的蜘蛛和最小的昆虫无法凭人眼看见。

These waves are a kind of electromagnetic energy that cannot be seen with the human eye.

这些波是一种肉眼看不到的电磁能。

Infrared waves are a kind of electromagnetic energy that cannot be seen with the human eye.

红外线是一种肉眼看不见的电磁能。

And in all honesty, I think we're looking at things God never intended for human eyes.

如果我要尽情说出来，那我想，我们眼前看见的事物是上帝不许人的眼睛看见的！”

The arrangement might look reciprocal to human eyes, because it is keeping the stump alive.

这种配植可能看起来与人类的眼睛是对等的，因为它保持了树桩的活性。

They note that the vehicles' laser and radar sensors can " see" farther than any human eyes can.

他们指出，车辆的激光和雷达传感器可以比任何人眼“看”得更远。