Researchers found tools like hammer stones and piledrivers made of stalagmites.

研究人员发现由石笋制成的锤子石和打桩机等工具。

Normally, this would involve the piling rig, working from above.

通常 这项工作需要打桩机，从地上进。

He sold his pike, his pile driver, even his pin cushion and pillowcase.

的长矛、打桩机，甚至的针插和枕套。

His mind may turn to the stock market or he may become fascinated by the operation of a pile driver on his way to work.

在去上班的路上，可能会想着股市或对路边的打桩机着迷。

But with an economic crisis to tackle and what I suspected might be a limited window to get my agenda through a Democratically controlled Congress, I was convinced that his pile-driver style was exactly what I needed.

但是，由于经济危机需要解决，而且我怀疑我的议程通过民主党控制的国会的机会可能很有限，我确信的打桩机风格正是我所需要的。