At least two subspecies, the Quill Rat and the Thorned Beast, are known to fire their quills without provocation. 目前所知至少有两个种类,硬毛老鼠和多刺野兽,会不经挑衅而直接发射它们的刺。
The special thorned morphology of Hydroxyapatite coatings ( THA) with micro-nano size was prepared by two steps electrochemical depositions on the surface of Titanium in this article, and the deposition process and forming mechanism of THA were also analyzed. 本文采用两步电化学方法在金属纯钛表面沉积具有特殊形貌的荆棘状微纳羟基磷灰石涂层(THA),并对该涂层制备过程和形成机理进行了系统的研究。