桌子上有许多试管和烧瓶。

There are many ___flasks and test tubes on the table.

他在登山包里放了两个装满水的金属水壶。

He packed two metal ___flasks filled with water in his hiking bag.

实验室里的架子上摆满了各种大小不同的烧瓶。

The shelves in the lab were filled with ___flasks of various sizes.