to work hard over a long period, especially doing work that is difficult or boring

I've been slogging away for days on this essay and I'm still not finished. 我为了这篇文章已经埋头苦干好几天了，但还没有完成。

to travel or move with difficulty, for example through wet, sticky soil or snow, or when you are very tired

Despite the rain, they slogged on for another six miles. 尽管下着雨，他们还是又艰难跋涉了6英里。

They slogged up the trail in the rain. 他们在雨中沿着小道向上跋涉。

The soldiers slogged through mud. 士兵们在泥泞中跋涉。

to hit a ball hard and often in an uncontrolled way

a period of difficult or tiring effort

This semester was a long hard slog; I'm glad it's over. 这个学期非常艰苦，很高兴终于结束了。

That last hill before the finishing line was a long slog! 终点线前的最后一座小山是一段漫长而艰难的赛程！

a very hard, and often uncontrolled hit

And that was a real slog from Kumar. 那是库马尔的一次真正的大力击球。