In an ordinary chemical reaction five to 15 atoms near the reaction site engage in an intricate three - dimensional waltz that is carried out in a cramped region of space measuring no more than a nanometer on each side 在一般的化学反应中，靠近反应点的5 ~ 15个原子簇拥在不超过一奈米见方，就像是忙著跳错综复杂的三维华尔滋。
