名詞 work day:

1. a day on which work is done
   同義詞：workday, working day
2. the amount of time that a worker must work for an agreed daily wage
   同義詞：workday, working day

1. He kept banging away at his work day by day, until eventually the project was finished.
   他天天孜孜不倦地埋頭苦干，直到工程竣工為止。