这些怎么使用啊

.nav a{

 display: inline-block;

 -webkit-transition: all 0.2s ease-in;

 -moz-transition: all 0.2s ease-in;

 -o-transition: all 0.2s ease-in;

 -ms-transition: all 0.2s ease-in;

 transition: all 0.2s ease-in;

}

.nav a:hover{

 -webkit-transform:rotate(10deg);

 -moz-transform:rotate(10deg);

 -o-transform:rotate(10deg);

 -ms-transform:rotate(10deg);

 transform:rotate(10deg);

}