1·Some of them date back 200 years, which reflect the history of our area over the last two centuries.
其中一些可以追溯到200年前，反映了我们地区过去两个世纪的历史。
2·Instead of being a million years old, as earlier analysis suggested, the fossils appear to date back nearly 2 million years.
不同于早先的分析得出的一百万年，这些化石似乎可以追溯到近两百万年前。
3·These prehistoric wasp cocoons, known as trace fossils among paleontologists, date back 75 million years to what is now Montana.
这些史前黄蜂蜂巢——古生物学家称为遗迹化石——可以追溯到7500万年前的蒙大拿州。
4·These schools date back hundreds of years to when the only people who possessed knowledge and learning were the church.
这些学校可以追溯到几百年前，那时候唯一拥有学识的人就是教徒。
5·Many of these names date back many centuries and are Arabic in origin (eg, "Betelgeuse" means "the armpit of the giant"!
其中许多的命名时间要追溯到很多世纪以前，那时阿拉伯刚发源（例如，“参宿四”意思是“巨人的腋窝”！）