工作狂workaholic
Many Japanese people are workaholic.
许多日本人都是工作狂。
I do not want to become a workaholic.
我不想成为工作狂。
One who has a compulsive and unrelenting need to work.
工作狂难以抑制的和不松懈的需要工作的人
He is a young man who scorns delights and lives laborious days, and he never dates or goes to weekend parties.
他是个年轻的工作狂，从不与女子约会，也不参加周末聚会。
Colin Powell has a hard time letting go of work, even when he's forced to play - and sing.
美国国务卿鲍威尔平日一向是个"工作狂"，即便是放松一下的时候，比如唱歌，也是出于工作的需要。
参考资料：以上解释来自金山词霸