workhorse

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

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. 喫苦耐勞的人[usu with supp]

For years the Apple II had been the workhorse in schools across America. 過去很多年裡蘋果II一直是全美學校的主要電腦。

My husband never paid any attention to me. I was just a workhorse bringing up three children. 我丈夫從來不關懷我，我衹是一個養育了三個孩子的老媽子而已。