A nanometre is a billionth of a metre.

十亿分之一米是一纳米。

Five-nanometre gold particles, for example, look red, and silver ones look yellow.

例如，五纳米的金粒子呈现红色，银粒子呈黄色。

The water droplets themselves can be as small as a nanometre (a billionth of a metre) across.

水滴的直径可微小至一纳米（一米的十亿分之一）。

The nanometre corpuscle or nanometre material has its own special properties and new rules.

纳米微粒及纳米材料具有独特的性质和新的规律。

Finally, the image is cleaned up by a computer program and the 50-nanometre-resolution picture emerges.

最后，将该图像进行计算机降噪去斑处理，得到一张50纳米分辨率的图片。