At the concert, the pianist played several well-known warhorses from the Romantic era.

warhorses 是由 war（战争）和 horse（马）组成的复合词，原指"战马"。在音乐术语中引申为"经过时间考验的经典曲目"，比喻这些作品像战马一样久经沙场、历久弥新。