There have been a lot of changes within the department since I joined.自我加入后，部门内发生了很多变化。I was taken aback to find an elderly woman sitting inside the door of the men's room.看到一个老妇人坐在男厕所的门内，我吓了一跳。Training is offered at each level in the department.部门内各级人员都要进行培训。