wheel case的用法和樣例：
例句
- In fact, a case of black shagreen, resembling a medallion portrait, was suspended from the ribbon.
的確，那條帶子上懸著一個黑軋花皮的圓匣子，很象個相片匣。 - She sweeps a litter of disarranged papers out of her way, snatches a sheet of paper from her stationery case and tries resolutely to write.
她把一堆亂紙推到一旁，從文具匣里抓起一張信紙，決心寫下去。
