picometre

例句：

1. 1. The microscopeis used to examine microscopic objects.
   显微镜用于观察微观物体。
2. 2. Thedistance between the two points is 500 picometers.
   两点之间的距离是500皮米。
3. 3. The particlesize of the material ismeasured in picometers.
   材料的颗粒大小以皮米为单位测量。