C 手提箱，衣箱 a flat bag for carrying clothes and possession when travelling

　suitcase　的意思是“手提箱，衣箱”，多指旅行时用来装衣物的扁平的箱或包，可用作可数名词，也可用作不可数名词。

　label the ～　在手提箱上贴标签
　black ～　黑色的手提箱
　blue ～　蓝色的手提箱
　red ～　红色的手提箱
　in the ～　在手提箱里
　on the ～　在箱子上
　a ～ of clothes　一箱衣服

　The suitcase is fairly heavy.　这只衣箱子相当重。
　Remember to label your suitcase before you go to the airport.　记住在去机场以前在手提箱上贴上标签。
　The suitcases were searched at the customhouse.　这些手提箱在海关受检查了。
　Her only possessions were ten suitcases of clothes.　她仅有的财产是十箱衣服。
　I'll have your suitcases sent forward to the hotel.　我会叫人先把你的箱子送到旅馆去的。