go round like a horse in a mill

GO词组... ... go round and round\ 旋转 go round like a horse in a mill\ 象驴推磨一样千篇一律地干活\ 干单调乏味的工作 ...

什么意思... ... go round like a horse in a mill 千篇一律(或单调乏味)地干活儿 hold one's horses 忍耐，不冲动，镇静 ...