const result = { success : [ "max-length" , "no-amd" , "prefer-arrow-functions" ], failure : [ "no-var" , "var-on-top" , "linebreak" ], skipped : [ "no-extra-semi" , "no-dup-keys" ] }; function makeList ( arr ) { // Only change code below this line const failureItems = []; for ( let i = 0 ; i < arr . length ; i ++) { failureItems . push ( `<li class="text-warning"> ${ arr [ i ]} </li>` ); } // Only change code above this line return failureItems ; } const failuresList = makeList ( result . failure ); console . log ( failuresList ); `和 ${都是必不可少的。 Template Literals。