Voluntary workers built a road to the boy's camp.

自愿工人建了一条路，通到男孩子们的营地。

Churn among workers in such roles, both voluntary and involuntary, is around twice what it is for other positions.

担任此类职位的员工（无论是自愿还是非自愿）的流失率大约是其他职位的两倍。