掌握证据

我们掌握了一定的证据

(就能活下去) ── Previous context

“We've got certain evidence against you.”

说明警方已经掌握了一定的证据

(广才既然已经传出了信号) ── Previous context

“it means the police already have some evidence.”

他们都掌握了什么证据

(同时尽可能地掌握) ── Previous context

“And try to find out as much as possible about what evidence they have.”