Cobblestone
n. 圆石, 鹅卵石
✅ 同义词
🗣️ 情景例句
Are you sure? But ... OK.
你确定吗？ 但……算了。
If he doesn't take care of him, I will.
如果他不，我将照顾他。
and found our then prevailing primitive state completely uninteresting to their own advanced knowledge.
并且发现我们地球当时普遍存在着的原始状态同他们先进的知识相比是索然无味的。