The carvings on the cabin have lost lustre (faded) long before , the slates on the road have been outworn to their slipperiness by to-and-fros of generations.
Every historian — sometimes unconsciously, but always inevitably — must have put to himself the question: How long could such-or-such an outworn system last?
已泛旧，青
板也被几
度疲惫不堪，筋疲力尽。
位历史学
——有时是不自觉地， 但总是不可避免地——都必须向自己提出这
问题：这
