multiple annual ring

例句：

1. 1.The company employs a large workforce with multiple departments.
   该公司拥有一个由多个部门组成的庞大员工队伍。
2. 2. The museum has a collection of over 50,000 items from around the world.
   博物馆收藏了来自世界各地的超过50,000件物品。
3. 3. The research team found that there were multiple factors contributing to the problem.
   研究小组发现，导致这个问题的因素有多个。