Kinetic energy is stored in the hammer as it is swung, and suddenly released to the nail and board when the hammer strikes the nail.

当锤子摆动时势能就储存在锤子中，而当锤子敲向钉子时，储存于锤子中的能量就突然向钉子和木板释放。

youdao

Each day you hammer a nail, place a board or erect a wall. Build wisely. It is the only life you will ever build.

每天你都会钉个钉子，放块木板或砌一面墙。明智地营造你的房子。这是你唯一可以营造的生活。

youdao

Shape the nail, using a file or emery board.

塑造钉子，使用一个文件或金刚砂董事会。

youdao

Many carry out elaborate mental exercises, building entire houses in their heads, board by board, nail by nail, from the ground up, or memorizing team rosters for a baseball season.

NEWYORKER: Hellhole

While the board fought me tooth and nail, the market agreed with me by pushing the share price to an all-time high.

BBC: Sir Stelios threatens Easyjet stake sale over plane deal