Abstract: The cognizance of international terrorism is the precondition of preventing and annihilating it, while the necessity and difficulty contemporarily exist in definition of terrorism.

• 文章摘要: 要防止和消灭国际恐怖主义必须首先认识国际恐怖主义，定义恐怖主义具有必要性但同时具有一定的困难性。