区别就是alone 和lonely 的区别，alone表示孤单一人，而lonely 表示心里的寂寞，具体的不同如下
feel alone中文意思是，感到孤单，感到孤独
"The ability to broadcast to our social group means we need never feel alone," he says.“向我们的社会群体传播信息的能力意味着我们永远不会感到孤独。”他说道。
feel lonely中文意思是感到孤独，感到寂寞
The fact that she is not coming today makes her grandmother feel lonely and neglected.
