It sounds like it's extremely old. So probably some pages are at the point of crumbling into dust?

听起来它好像非常古老。那么，也许有些书页到了即将碎成粉末的程度？

youdao

Have you ever had the sensation of falling through infinite space, shattering, crumbling, of being about to disappear like a raindrop into the ocean?

不知道你曾否有过这样的感受：掉进了一个没有边际的空间里面，不断地破碎，变成小块，好像雨滴落入大海那样的慢慢消失？

youdao

Even so, Boosaaso is still a crumbling, broke, rough-and-tumble place, decaying after years of neglect like so much of war-ravaged Somalia.

即便如此，布萨阿索依然是一个日益破碎、濒临破产、粗陋衰败的地方，就和饱经战乱的索马里一样被世人年复一年地遗忘。

youdao

Facebook, for one thing, is not going to spend its new pile of shareholder cash on buying a rickety, crumbling contraption like RIM.

FORBES: Will Facebook Buy RIM? Uh, No, Not In A Zillion Years

He says that crumbling up the course like this forced him to study his own teaching more than he had at the lectern.

NEWYORKER: Laptop U

Its concrete tower blocks were crumbling, the peasant housing like slums, and the infrastructure chronically rundown.

BBC: New horizons in Kazakhstan