同根派生 英汉例句The boy climbed onto the roof top.男孩爬到屋顶上。They roofed the house with tiles.他们用瓦片给房子盖屋顶。The heavy rain has penetrated the roof of my house.大雨渗透了我家的房顶。Just then, a helicopter zoomed over the house.就在那时，一架直升飞机从房顶上呼啸着飞过去了！