cmd_activate

command: /activate

quick ref:

/activate [x y z] [@entityname]

description:

 activate a given block or entity and return its value. 
Examples:
/activate x y z   call activate function of the given block.
/activate		  default to fromEntity
/t ~2 /activate   a simple loop to activate every 2 second

激活一个指定的方块或实体并显示结果。