单词	open sth up
释义	请查阅词条：open something up
随便看	difficult situation difficult task difficult to believe difficult to follow difficult to keep down difficult to please difficult to tell apart difficult to track down difficult (to understand) difficult to understand difficult word difficulty diffidation diffidence diffidences diffidency diffident diffident about diffidently diffidently diffidentness difflation diffluence diffluency diffluent 什么是瓦尔迪维亚雕塑？什么是瓷器？什么是生化武器? 什么是生命什么是生物信息学？什么是生物入侵? 什么是生物分类系统什么是生物武器什么是生药学？什么是甲龙？ Kronleuchter Kronprinz Kronprinzessin Kronrad Kronsäge Kropf Kropfachse Kropfrohr Kropftaube Krug