某人正在干、做或實行的某事，尤指作為職業或事業；義務或任務。

　　Something that one is doing, making, or performing, especially as an occupation or undertaking; a duty or task.

　　他們被迫賣房還債。 被迫做某事負責做某事… 有義務有責任去做某事被迫干某市。

　　They were obliged to sell their house in order to pay their debts.