It means to scratch your head in order to help you remember something you've forgotten.

这意味着你抓耳挠腮以使自己想起你遗忘的东西。

youdao

But the fact that states have to spell out bans like this might make you scratch your head.

可事实上这些州立禁令可能会让你抓狂。

youdao

But the fact that states have to spell out bans like this might make you scratch your head.

可事实上这些州立禁令可能会让你抓狂。

youdao