staff是单数还是复数

　　staff例句分享

　　The staff are all members of a trade union.

　　全体职工都是工会员。

　　I find the hotel staff particularly courteous.

　　我发现饭店员工特别谦恭有礼。

　　We were told he has many fans among the staff.

　　我们得知在工作人员当中也有许多他的影迷。