TY - JOUR TI - Seeing with a single scale is always unbelieving from magic to two-scale fractal AU - He Ji-Huan JN - Thermal Science PY - 2021 VL - 25 IS - 2 SP - 1217 EP - 1219 PT - Article AB - A same phenomenon can lead to debating laws when observed on different scales, two-scale observation is needed for a discontinuous problem, the large scale matches with the continuum assumption, while the smaller one is to reveal the discontinuous properties. The basic properties of two-scale fractal are discussed in a layman way.