警方已经确定了这起谋杀案的主要嫌疑人。

The police have identified the ___prime suspect in the murder investigation.

总统是刺客子弹的主要目标。

The president is a ___prime target for the assassin's bullet.

了解文化和历史至关重要。

It is of ___prime importance to find out about culture and history.