erraticadj.古怪的；飘忽不定的；不稳定的erratic index漂砾指数erratic pulse不规则的脉搏erratic error不规则误差erratic shifts不稳定漂移erratic firing不规则发火erratic doping不规则掺杂erratic bounce(球)不规则的弹跳erratic picture不稳定的图象erratic subsoil不均一土壤erratic feeding不均匀给进

1. Erratics ate boulders transported by glaciers and deposited some distance from their point of origin.
   漂砾是由冰川搬运并在距发源地一定距离的地方堆积的巨砾。