I screwed the top back on the vacuum flask.

我把瓶盖拧回了保温瓶。

He sold vacuum cleaners, vacuum flasks and vacuum tubes.

他卖真空吸尘器、保温瓶和电子管。

It was the unconquerable Marta, with vacuum flasks of hot coffee and sandwiches for all.

这是不可征服的玛尔塔，为所有人提供热咖啡和三明治的真空瓶。

We take a piece of ice and put it in a vacuum flask, and pump out all of the modern air, the air we're breathing right now, using a vacuum line.

我们取一块冰，把它放在真空瓶里，用真空管抽出所有现代空气，我们现在呼吸的空气。