原级：flask
1. 长颈瓶：-Films-薄膜 | -Flasks-长颈瓶 | -Cup-杯
1. Water came from a giant plastic barrel by the door, and was heated in vacuum flasks with an immersion heater.
2. flasks什么意思
2. " Maybe we could provide thermos flasks instead, " he told visiting Chinese journalists at his Rome office.