比较级是more unusual,更不寻常的
最高级是the most unusual,最不寻常的
More unusual is her refusal to come forward to offer her evidence.
更加怪异的是她拒绝出来向世人提供她的证据。
They are a rocky, lonely spot, but they are also one of the most unusual places in the world.
这是一个多岩石的、孤独的地方,但也是世界上最不寻常的地方之一。