PHP's new feature use enhances usage

<?php//  
PHP 7 
之前版本用法use some\namespace\ClassA;use some\namespace
\ClassB;use some\namespace\ClassC as C;use function some
\namespace\fn_a;use function some\namespace\fn_b;use function some
\namespace\fn_c;use const some\namespace\ConstA;use const some
\namespace\ConstB;use const some\namespace\ConstC;// 
PHP 7+ 用法use some\namespace\{ClassA, ClassB, ClassC as C};
use function some\namespace\{fn_a, fn_b, fn_c};
use const some\namespace\{ConstA, ConstB, ConstC};
?>