The mustard is sold in powder form.

芥末是以粉末状出售的。

《牛津词典》

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And then they found that they could freeze-dry this preparation of virus, and freeze-drying to lower the temperature, freeze it, then extract out all the water, so you're left with a powder, basically a powdered form of the virus, that could be shipped all over the world, and then reconstituted by adding water to it.

研究者们发现可以冷冻干燥这些病毒制剂,冷冻干燥就是就是降低温度,冷冻病毒,然后提取出所有水份,然后就剩下一些粉末,这主要是粉末状的病毒,这样就能将它运往全世界,并可以通过加水来恢复病毒的活性

耶鲁公开课 - 生物医学工程探索课程节选

These porous sheets, which together form a coarse white powder, vastly outperformed sheets that did not have the pores, and commercially available chunks of boron nitride that is not made up of the tiny sheets.

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She also melted chocolate with porcini powder and streamed ribbons of the mixture into cold water to form thin branches.

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Italian pasta and Indian rice are sold alongside milk powder from Dubai and reminders of recent aid dependency in the form of cooking oil from the World Food Programme.

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