Don't buy any product made of ivory.

不要买用象牙制成的任何产品。

An article made of ivory.

过象牙塔式的生活。

An article made of ivory.

它是用象牙雕成的。

Is it made of ivory?

它是象牙做的吗？

My grandmother has some jewelry made of ivory.

我祖母有一些象牙首饰。