When we touch something, the machano-reporters feel the touch and through a network of nerves to send signals to the brain.This informs the brain of the location of the touch, the amount of force used,and the speed at which *it was used.
这段话怎么判断it的指代对象是touch呢
或者it判断指代对象有什么可以注意的技巧吗 谢谢