英语高人请进desk-cycle什么意思?

待桌子的自行车
课文里的吧 我在网上找到了原文 前后文看来就是这个意思
“It’s a Danny Desk-cycle.” Danny says. “You glue it onto your bike, It’s a desk so you can do your homework as you ride.”
“I don’t think it would be safe to do my homework on a bicycle.” she says. 骑车的时候可以写作业==!
我想是课文中自己造的词.