yán jiū rén yuán / tōng guò / fǎn fù / jié jīng / tí chún / zhè zhǒng / huà hé wù / yǐ biàn / jìn xíng / hòu xù / shí yàn

研究人员通过反复结晶提纯这种化合物，以便进行后续实验。

The researchers purified this compound through repeated crystallization so that they could conduct follow-up experiments.