低浓缩铀

low-enriched uranium

low / beneath / to lower (one's head) / to let droop / to hang down / to incline

concentrated / dense / strong (smell etc)

to concentrate (a liquid) / concentration / espresso coffee / abbr. for 意式濃縮咖啡|意式浓缩咖啡

to withdraw / to pull back / to contract / to shrink / to reduce / abbreviation / also pr. [su4]

enriched uranium

uranium (chemistry) / Taiwan pr. [you4]