Smiling and laughing has actually been shown to relieve tension and stress.

微笑和大笑确实已证明能缓解紧张和压力。

《柯林斯英汉双解大词典》

I always take a slow, deep breath to relieve tension.

我总是借由缓慢的深呼吸来纾解紧张。

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Varying your work routine also helps relieve tension.

改变您的工作状态也有助于消除紧张。

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I'd always had a nagging sense that Bill might feel the need to snap my neck someday, just to relieve tension, and I'd been his friend for six years.

NPR: Sergeant Notes Odd Rituals of War in Afghanistan

But Malan hit the first ball after the break from Panesar to the boundary to relieve the tension in the visitors' dressing room before finding a gap on the leg side to win the game with a single and compete his century.

BBC: Malan steers Middlesex to victory over Sussex