acicular structure造句

• Influenced by the alternating current field , except that a little of eutectic iron - phase still is the acicular structure , the most of eutectic iron - phase of the al - 20si - 5fe - mn alloy is refined into tiny particles which is segregated
  Al - 20si - 5fe - xti合金通过交流电场作用，共晶组织全部呈细小的颗粒状均匀分布于- al基体上。