relief 
英 [rɪˈliːf]  美 [rɪˈlif] 
n. 宽慰；救济；救援物资；免除，减轻，解除；代班人

例句：
That's a relief! 

这样就放心了！

It's a great relief to be back. 

回来真让人安心。

To my relief, he said yes. 

令我宽慰的是他同意了。

It was unbearably hot, but the cold drinks brought some relief. 

天气热得难以忍受，不过喝冷饮后还是凉快了一些。

She turned on the air-conditioning to bring some relief from the oppressive heat and humidity. 

她打开空调，缓解一下闷热和潮湿。

lasting relief from the symptoms of hay fever 

花粉症症状的彻底解除