I well remember our playground, which was behind the house. There were no trees, and the ground was as hard as stone.

我记得我们的操场，它就在房子后面。没有树，地面像石头一样坚硬。

She had nothing to say to that. She gnawed on the sausage and stared at him coldly. Hard as stone, she thought.

她无言以答，便一边啃香肠，一边冷冷瞪他。强硬如山，艾莉亚心想。

" But surely, then, like other fossil wood, it must be as hard as stone, and cannot float? "

“但是，那么，像其他木化石一样，它肯定像石头一样坚硬，并且不能漂浮吗？”