"She keeps plugging away at her dissertation"
"Mules plodded in a circle around a grindstone"
"He slugged me so hard that I passed out"
Sixey made a mighty slog, but failed to strike the ball.
He'd have to slog at this thing till he got it right.
He and his brother had slogged at one another with bare fists.
All that..morning..slogging away cleaning Carleton's study.
牛津高阶第八版
美国韦氏词典
Dictionary.com
Free Dictionary
维基百科 (自由的百科全书)