subsidiary rod辅助杆subsidiaryn.子公司；附属机构adj.辅助的；补贴的；附属的subsidiary conditions附加条件subsidiary scale mark辅助刻度线subsidiary obligation附属义务subsidiary foodstuffs副食品subsidiary air supply补充的空气供应subsidiary projection副射影subsidiary ingredient配料subsidiary securities子公司证券subsidiary corporation子公司subsidiary information辅助资料

1. He struck the beam with his head.
   他的头撞到梁上了。
2. If you hit your head on that beam,you'll know it.
   头要是撞到梁上去了，就有你的好受。