What has roots as nobody sees,it\\\'s taller than trees,up,up it goes.And yet never grows?It\\\'s__

What has roots as nobody sees,it\\\'s taller than trees,up,up it goes.And yet never grows?It\\\'s__
What has roots as nobody sees,it\\\'s taller than trees,up,up it goes.And yet never grows?It\\\'s__

What has roots as nobody sees,it\\\'s taller than trees,up,up it goes.And yet never grows?It\\\'s__
寒假作业里竟然有猜词,人才!
building,我猜是大楼
翻译是它有根没人见,比树高,节节高,但从来不长,它是什么?