许多公司将研究活动转移到了创新中心。

Many corporations have shifted their research ___activity to innovation hubs.

警方正在调查该社区犯罪活动的激增。

The police are investigating a surge in criminal ___activity in the neighborhood.

他震惊地发现其合伙人在组织内的非法活动。

He was shocked to discover his partner's illegal ___activity within the organization.