To make their spheres Dr Yin and his colleagues stir iron-oxide particles into a liquid polymer resin, which is then dispersed in oil.

为制造出微滴球体，Yin博士和同事把氧化铁粒子放入液体聚合树脂搅拌后散入油中。

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To make their spheres Dr Yin and his colleagues stir iron-oxide particles into a liquid polymer resin, which is then dispersed in oil.

为制造出微滴球体，Yin博士和同事把氧化铁粒子放入液体聚合树脂搅拌后散入油中。

youdao