North Korea is probably the hardest intelligence target of all.

朝鲜可能是所有情报机构中最难对付的目标。

There is no doubt that Ukraine was a hard target.

毫无疑问，乌克兰是一个硬目标。

They're coming together in international networks to set hard target for decarbonization to which they hold themselves mutually accountable.

他们在国际网络中走到一起为脱碳设定硬目标他们认为自己要相互负责。