scratcher

基本解释

Like the previous chapter, “Interrogation Techniques” is a head-scratcher.
同前一章一樣，“訊問技術”很令人頭疼。
In fact, the illusion of time may be created by the brain itself, which is at least as much of a head-scratcher as the plot of Inception.
實際上，雖然時間幻覺是大腦自身産生的，但正如《盜夢空間》的情節一樣，這種幻覺也是個令科學家感到費解的難題。
After winning three dollars on a scratcher ticket that was given to him as a gag gift, Srivastava got to wondering about the process of how tickets were made.
有朋友送給斯裡瓦斯塔瓦一張刮刮樂讓他玩玩，結果中了三美元。這讓他開始琢磨彩票的中獎是如何排定的。

After its mergers Pfizer lost scientists either through voluntary departures or--a real head-scratcher--in firings.
FORBES: Drug Drought
After its mergers Pfizer lost scientists either through voluntary departures or, in a real head-scratcher, firings.
FORBES: Magazine Article
And, considering that for most companies the marketing budget is their biggest expense, this is a head-scratcher.
FORBES: Marketers Have A Better Process Buying Chairs For The Cafeteria, Than For Hiring An Ad Agency