It is always the basic material which constitutes the object and which, in the natural course of things, is worn down and becomes "older".

构成客体的总是基本物质，而在事物的自然过程中，这些基本物质被磨损，变得“陈旧”。

youdao

Patience, of course, does not come easily to a fan base worn down by nine straight losing seasons.

对于被连续9个失败赛季折磨得疲惫不堪的球迷群而言，耐心当然来之不易。

youdao

As for sightseeing, there's little time for that during their studies at the Olympics, but the students are welcome to stay for a bit on their own afterwards - if,of course, they are not worn out.

VOA: standard.2010.02.26

In short, the current path is unsustainable and the only course to prevent the U.S. from following down the well-worn path of the PIIGS debacles is to cut spending, dial back the social guarantee escalations, reduce the tax burden on businesses, flatten the burden on individuals, and live within our means.

FORBES: The Spending Must Stop