outlandish

He arrived wearing an outlandish hat shaped like a pineapple. ▶

他戴着一顶形似菠萝的古怪帽子来了。

Although some environmental proposals initially seem outlandish, they may eventually inspire practical solutions to urban pollution.

虽然一些环保提议起初看似荒诞，却可能最终为解决城市污染提供切实可行的思路。