permennant正确写法是permanentadj.永久的;永恒的;长久的n.烫发(等于permanent wave)
例句
Heavy drinking can cause permanent damage to the brain
酗酒能造成永久性大脑损伤。
At the end of the probationary period you will become a permanent employee.
试用期结束后,你将成为长期雇员。
水利万物而不争,
而万物莫能与之争。