As a resul t, nacre thickness is sometimes just a cosmetic layer t hat can wear thin over time.

所以真珠质的厚度就像脸上化妆品，不久就会磨薄了。

edu.sina.com.cn

Otherwise, he said, patience in the United States and in other NATO countries for the mission could wear thin.

他说，否则美国以及其他北约国家对这一使命的耐心就会逐渐丧失。

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Vacation Revitalizes Your Mind - the demanding events of our weekly routine can wear thin on the livelihood of our psyche.

度假可以让你的身心充满活力——每周例行的工作不断地吞噬着我们的心灵。

article.yeeyan.org

Otherwise,he said, patience in the United States and in other NATO countries for the mission could wear thin.

VOA: standard.2009.06.11

More generally, the novelty of serving on government task-forces may begin to wear thin.

ECONOMIST: The new establishment

In short, the magic of Harry, on its fourth outing, is starting to wear thin.

NEWYORKER: Harry Potter and the Goblet of Fire

Nitrous oxide increases blood flow to the stomach, thickening the mucous lining that COX-2 inhibitors tend to wear thin.

FORBES: Health