The nano crystal is purified and then dispersed in the external aqueous phase to form the contrast agent for intravenous injection.
纳米晶经纯化后分散于外水相中，得到可静脉注射的造影剂。
The nano crystal is purified and then dispersed in the external aqueous phase to form the contrast agent for intravenous injection.
纳米晶经纯化后分散于外水相中，得到可静脉注射的造影剂。
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