三: three下: below; down; under; undernea ...标: Rockwell A scale符号: character; sign; symbol; mar ...双下标符号: double-subscript notation目标符号: aiming symbol; destination symbol; target symbol品标 商标符号: brandmark三指标符号: three-index symbol商标符号: brand mark音标符号: phonetic transcription symbols游标符号: cursor mark跟踪目标符号: tracking symbol国际音标符号: ips symbol下标变量符号: subscript variable symbol下标可变符号: subscripted variable symbol三下: mishimo; mishita; sage; sange下标: footnote; subscript index; suffix; super/subscript“非”标符: not operator敲三下: knock three times三下胺: tribenzylamine三下基: tribenzyl三下乡: "a program under which officials, doctors, scientist and college students go to the countryside to spread scientific and literacy knowledge and offer medical service to farmers; a program under which officials doctors scientist and college; officials, doctors, scientist and college students go to the countryside踢三下: knock three times导数标符: derivative operator结束标符: closing flag