Karl Marx, for example, had read so many books in the British Library before his writing of new theories that his footprints were left on the ground of the seat where he usually sat.

• 比如卡尔.；马克思在提出他的马克思主义理论之前，在大英图书馆中读了非常多的书、以至于他经常坐的那个位置下面都留下了他的脚印。