work-horse

n (a) horse that does work, eg pulling heavy loads 使役的马. (b) (fig 比喻) person who is relied upon by others to do a lot of hard work 大家赖以做重活儿的人: He's a willing work-horse. 他是个埋头苦干的老黄牛.

work for, work hard, work hard at..., work of art, work off, work on, work one's way, work out, work round to sth/sb, work sb over, work sth off, work sth up, work study, work to sth, work top (also `work surface), work towards sth, work up, work-basket, work-bench, work-force, work-in, work-load, work-out, work-room, work-shop, work-shy, work-table, work-to-rule, workable, workaday, workaholic, workbook, workday, worker, workforce, workhouse, working, working capital, working day, working party,