These grains were about half a micron in size , far bigger than previously thought .

这些颗粒大约半微米大小，比预想的要大许多。

Ash particles are normally in the 50-100 micron ( 0.05 to 0.1 millimetre ) range .

灰粒大小通常在50-100微米（0.05到0.1毫米）之间。

That problem was due largely to the fact that the coating was only a fraction of a micron ( millionth of a metre ) thick .

这主要是由于涂层的厚度仅为几微米（百万分之一米）。

And it makes predictions ; at micron scales the attraction between two masses will no longer depend on the square of the distance between them in the way that physicists since newton have required it to .

而且这一假设可以作出一些预测：例如如果该假设成立那么在微米尺度下两个物体之间的引力不会像牛顿以来所有的物理学家所想的那样和物体之间距离的平方成反比。

As a result , the makers have developed a generation of cells whose silicon layers are only a micron or two deep , as opposed to the usual thickness of 200-300 microns .

结果，制造商开发了一代硅层仅有两微米厚的电池，相对地传统电池通常是200－300微米厚。