All flammable materials contain phlogiston that is liberated in burning, leaving the "dephlogisticated" substance in its "true" calx form.

所有易燃材料均含有在燃烧过程中释放的发火物质，使“去表皮化的”物质保持其“真正”的杯状形式。

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There could also be rules about the use of printers at certain times of day; perhaps there are concerns about leaving sensitive materials on certain printers overnight.

还可能存在有关在每天的特定时段使用打印机的规则；或许会考虑连夜在特定的打印机上打印敏感材料。

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It's estimated that dumped computers take ten thousand years to break down, leaving a cocktail of toxic materials including lead and mercury.

这些废弃电脑预计要超过一万年才能分解，留下许多有毒物质，包括铅和汞。

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After several attempts, the researchers found a level which "inactivates both viruses and bacteria while leaving sensitive materials such as mammalian cells unharmed".

BBC: Cell infected with HIV

But Mr Moynahan uses Russian archive materials to chronicle Rasputin's life in exhausting detail, leaving few of its peculiarities unexplained.

ECONOMIST: Russian history

Since the robocasting machine allows the researchers to manipulate several inks at once, they are able to make new kinds of composite materials this way interlacing the filigrees, and even leaving holes in the material if that helps to arrive at the desired properties.

ECONOMIST: A new way to build complicated materials, micron by micron