workhorse

1. N-COUNT A workhorse is a horse which is used to do a job, for example, to pull a plow. 役马; 耕马

2. N-COUNT If you describe a person or a machine as a workhorse, you mean that they can be relied upon to do a large amount of work, especially work that is dull or routine. 吃苦耐劳的人[usu with supp]

For years the Apple II had been the workhorse in schools across America. 过去很多年里苹果II一直是全美学校的主要电脑。

My husband never paid any attention to me. I was just a workhorse bringing up three children. 我丈夫从来不关怀我，我只是一个养育了三个孩子的老妈子而已。