scratcher

基本解释

Like the previous chapter, “Interrogation Techniques” is a head-scratcher.
同前一章一样，“讯问技术”很令人头疼。
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.
实际上，虽然时间幻觉是大脑自身产生的，但正如《盗梦空间》的情节一样，这种幻觉也是个令科学家感到费解的难题。
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.
有朋友送给斯里瓦斯塔瓦一张刮刮乐让他玩玩，结果中了三美元。这让他开始琢磨彩票的中奖是如何排定的。

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