We find that Parkour and PK Silver in particular, offers three main areas of benefits for older adults.

我们阳跑酷可以给老年人带来三个方面的好处。

He really did a great job in the finale, especially in the PK round. He performed so well that the majority of the audience cast their votes for him.

他决赛的真的很好，尤其在PK那一轮，很多观众都因此给他投了票。

Some, like the AKM and the AK-74, retained the core principles of Kalashnikov's original design, while others, like the RPK and the PK machine guns, branched out into new roles and capabilities.

有些，如 AKM 和 AK-74，保留了卡拉什最初设计的核心原则，而另一些，如 RPK 和 PK 机枪，则分支出新的角色和能力。