The bark is usually ground up and sold in capsules or liquid form.

这些树皮通常被碾碎，以胶囊或者液体的形式贩卖。

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The particles are suspended in a clear liquid and are pushed around by an electric field created by transparent electrodes placed above and below the capsules.

这些粒子可以在透明的液体中悬浮，并受到放置在胶囊前后的透明电极产生的电场的作用，而来回移动。

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E Ink is based upon tiny capsules filled with positively charged white particles and negatively charged black ones, suspended in a clear liquid.

电子墨水[技术]基于微型胶囊，该胶囊填充有带正电荷的白粒子与带负电荷的黑粒子，悬浮在透明液体中。

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Kava and passionflower have long been used in traditional medicine for their calming properties, and the herbs are now sold in stores as capsules or liquid extracts.

CNN: Can herbal supplements treat anxiety?

The group infused a plastic-like polymer with microscopic capsules containing a liquid healing agent.

BBC: Time to heal: The materials that repair themselves

"Patients can speak to their pharmacist about the option of having the pharmacy compound Tamiflu capsules into a liquid, " DeAngelis said in an e-mail.

CNN: Children's flu drug in short supply