与外国人一起谈谈人生吧

2.But for music (=Were it not for music), life would be dull. 
 要不是音乐，人生会很无聊。 

But for“如果不是；如果没有”，

如：But for the safety-belt I wouldn't be alive today.
若没有安全带，我就不能活到今天。