To complicate things a bit more, we sometimes find atoms of a chemical element that are a bit different to what we expect. Take carbon, for example. The ordinary carbon we find in the world around us is sometime
aPHOTO IS EXAMPLE ONLY - IS NOT ACTUAL 照片仅是例子 - 不是 ACTUAL[translate] a每批皮料都会有一点色差. Each group of Pi Liao all can have a chromatic aberration.[translate] aThank you for your detail explain. 谢谢您的细节解释。[translate]...