可能来自 slug 拼写变体，词义由猛击引申为埋头苦干，坚持不懈。

1. I eventually got financial backing, but it was a slog.

我最终得到了经济支持，但这得来不易。

2. The men had to slog up a steep muddy incline.

人们只得在陡峭而泥泞的斜坡上艰难地行进。

3. Why should Melissa have to slog around the supermarket on her own?

为什么梅利莎会一个人在超市里面费劲地转来转去？

4. There is little to show for the two years of hard slog.

两年的埋头苦干却没有获得什么值得炫耀的结果。

5. But there must be no talk of final victory; rather, the long, hard slog to a solution.

但是这还谈不上是最后的胜利；而是长期、艰难地寻找解决方法的过程。