盒在下端具有单个瓶颈开口，该开口最初被成箔片、被涂覆的纸张原料、塑料等的薄膜层形式的易破的密封件所密封。

The cartridge has a single bottleneck opening at a lower end which is initially sealed by a breakable seal in the form of a film layer of foil, coated paper stock, plastic or the like.

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这些树是制造优质纸张的原料。

These trees provide the raw material for high-quality paper.

《牛津词典》

制造这种物质，该小组把原料石墨磨碎，用化学品净化，把它重塑成“纳米结构”，然后再把它加工成纸张。

To make the material, the team milled raw graphite by purifying it with chemicals to reshape it into 'nano-structured configurations' which are then processed into sheets of paper.

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