multiple earth system

例句：

1. 1.The company employs multiple teams to handle different projects.
   该公司雇佣多个团队来处理不同的项目。
2. 2.There are multiple factors that contribute to the problem.
   导致这个问题有多个因素。
3. 3. The teacher asked multiple questions to ensure understanding.
   老师问了多个问题以确保理解。