By fossils, we mean traces of prehistoric animals such as bones, which become mineralized, or impressions of bones or organs that are left in stone.
我们所说的化石，指的是史前动物的遗迹，如已矿化的骨头，或留在石头上的骨头或器官的印痕。
2
Lengthy periods of economic stagnation or decline have almost always left society more mean-spirited and less inclusive, and have usually stopped or reversed the advance of rights and freedoms.
长期的经济停滞或衰退几乎总是使社会变得更加刻薄、更缺乏包容性，通常还会阻止或逆转权利和自由的进步。
3
I mean it didn't mean anything. I should have never left, OK?