header
n
1 (infml 口) dive or fall (esp into water) with the head first 头部向下跳水或跌落(尤指入水)
take a header into the swimming-pool 头先入水跳入游泳池.
2 (in football) act of hitting the ball with the head (足球运动中)用头顶球.
On our way home that night I looked down and saw that the necklace was not around my neck any more. I told Pierre. We rushed back to the palace and looked for it.We asked everyone there if they had found a necklace, but without luck. We couldn't find it;