have head like a sieve
健忘
A：What’s that man’s name?
B：I thought you’d been introduced to him twice.
A：Yeah. But I still cannot remember his name. I’ve got a head like a sieve
A：那位先生叫什么来着？
B：我想已经给你介绍了两次了。
A：不错。但我还是没有记住 他的名字，我很健忘。
