museum piece
noun
1- an object that is worthy of display in a museum博物馆藏品。
1.1
- Brit. a person or object regarded as old-fashioned, irrelevant, or useless〈英〉过时的人（或物）, 老古董：
we're nothing but museum pieces - machines can do everything that we can do.
我们只是些老古董罢了——我们能做的机器全能做。