scratcher

1. I think virtually nothing has been done in this field so I think this is an area that is a real head scratcher and we do not even have any exploratory data.
   我想，目前该领域尚未有真正的进展，这是一个很令人头痛的领域，我们甚至没有任何探索性的数据。
2. Do you decide to buy a cat scratcher or cat climber? If no, please explain.
   您有，或者想过要买一个猫爬架吗？如果没有，请告诉我原因。
3. Simulation analyzing and optimization for scratcher in manipulator based on ADAMS
   基于ADAMS的机械手抓取机构的仿真分析及优化
4. How he wasn't even nominated for his performance as his hero Andy Kaufman in "Man on the Moon" is a head scratcher.
   他在月亮上的男人中的表演竟然没有获得提名完全是莫名其妙。
5. The pump consists of swirl nozzle, valve cover, plug assemble and sand scratcher.
   该泵采用了旋转接头、螺旋阀罩、柱塞总成、刮砂器于一体的多功能防砂结构，具有排而不卡和漏失量小的特点。

noun

1. a device used for scratching

2. a person who scratches to relieve an itch

3. a workman who uses a tool for scratching