backboard是什么意思？

backboard的音标：backboard的英式发音音标为：['bækbɔ:d]backboard的美式发音音标为：['bækbɔrd]...

The ball rebounded from the backboard.球从篮板上弹回来.Galvanized by the authority in her voice, Pork approached the wagon and fumbled at the backboard.波克听了思嘉这种命令的口气, 怎敢怠慢.于是他走到马车边,在马车后厢摸索着.The ball hit the backboard and bounced...