a bottle with a narrow top, used in scientific work for mixing or storing chemicals 烧瓶 
a culture flask containing 4 ml of the medium 装有 4 毫升培养基的培养瓶 Heat the solution gently in a conical flask. 把溶液装在圆锥形烧瓶里略微加热。
Oxford Collocations Dictionaryadjective- metal
- silver
- water
- …
- fill
- carry
- pull out
- …
- contain something
- flask of
- (also vacuum flask (British English), North American English vacuum bottle)
a container like a bottle with double walls with a vacuum between them, used for keeping liquids hot or cold 真空瓶；保温瓶；热水瓶；冰瓶 a flask of tea/coffee 一保温瓶的茶／咖啡
Oxford Collocations Dictionaryadjective- metal
- silver
- water
- …
- fill
- carry
- pull out
- …
- contain something
- flask of
- (especially North American English) (also hip flask North American English, British English)
a small flat bottle made of metal or glass and often covered with leather, used for carrying alcohol with you 小扁酒瓶（用金属或玻璃制成，常带皮套，随身携带） Extra ExamplesHe had a flask of Scotch in his pocket. 他的口袋里装着一瓶苏格兰威士忌。 She pulled out her flask and drank from it. 她拿出瓶子喝了起来。 When he climbed in the snow he always carried a silver flask of brandy for emergencies. 他在雪天登山时总是带上一银瓶白兰地以防急需。 He took a swig from his hip flask. 他从酒壶里喝了一口酒。
Oxford Collocations Dictionaryadjective- metal
- silver
- water
- …
- fill
- carry
- pull out
- …
- contain something
- flask of
Word OriginMiddle English (in the sense ‘cask’): from medieval Latin flasca. From the mid 16th cent. the word denoted a case of horn, leather, or metal for carrying gunpowder. The sense ‘glass container’ (late 17th cent.) was influenced by Italian fiasco, from medieval Latin flasco. Compare with flagon.