I wish u'd unclench Ur fists.

我多么希望你能松开你的双拳。

Unclench your fist, live from your heart.

把拳头分开，随心而活。

Quite frankly I think that it is countries like the USA that need to unclench their fists.

真够坦白的，我认为应该是：像美国一样的国家应该摊开他们的掌心。

Perhaps alluding to Iran, he said "we will extend our hand if you are willing to unclench your fist."

他说：“我们愿意伸出友谊之手，只要你愿意松开你的拳头”，这则可能暗指伊朗。

Never try to open the car door or hall door through improper means such as strike, kick, and unclench.

严禁撞击、踢打、撬动，或以其它方式企图打开电梯的轿门和层门。