Eventually, corrugated cardboard struck a fine balance between retaining heat without trapping too much moisture.

最后，披萨店就采用了瓦楞纸板来做披萨盒，既可以保温，又不会让太多湿气留在盒子里。

It's wrapped in 24 layers of corrugated cardboard, which makes it light and just about sound-proof.

它由24层瓦楞纸板包裹，这样既轻便又隔音。

In 1974 pizza boxes were not made of corrugated cardboard, they were made of very thin cardboard.

在1974年，披萨盒不是由瓦楞纸板制成的，它们是用非常薄的纸板制成的。

That cardboard and paper is sorted by workers who remove any remaining contaminants, or stray plastics, and separated the materials into bins for newspaper, mixed paper, and corrugated cardboard.

瓦楞纸板和纸张通过人工分类把其中的残留污染物和塑料碎片除去，然后把它们按材料分别投入装废旧报纸的桶，装混合纸的桶和装瓦楞纸的桶。