Top Definition
A period of difficulty within some activity.
When I was reading Hegel I found some parts understandable but some other parts were tough sledding.
作者 jazzbox35 2010年11月24日
免费每日邮件

输入你的邮箱地址,每天早晨收到免费的“每日城市之词”

邮件由 daily@urbandictionary.com 发出。我们决不会发送垃圾邮件。

×