I think I'm lost. 我觉得我迷路了。

　　If you get lost in the maze, don't panic. 就算你迷路了，也不要惊慌。

　　My boss appears lost in thought. 我的老板好像若有所思。

　　Your joke is completely lost on us. 我们完全没有听懂你的笑话。

　　Can you help me? I'm lost. 你能帮我吗？我迷路了。

　　Sure. Where do you want to go? 好的，你想去哪里？