英文释义 (noun) A surgical instrument used for scraping the surface of bones；a surgical instrument for scraping bone; surgical rasp or file
例句 EXAMPLE: The surgical nurse carefully inspected a tray containing a set of steel scalpels and xysters.
短语 to hit the wall
英文释义 (IDIOM) To encounter the most difficult part of a task; to meet an obstacle that slows progress；if you hit the wall when you are trying to achieve something, you reach a situation where you cannot make any more progress.
例句 EXAMPLE: Our ambitious new project went smoothly for the first month, but then we hit the wall and realized that it was going to be much more difficult and expensive than we thought.