Dear @gl-liao in fact we have two other ways too like below:
$robot = \Phalcon\Mvc\Model::cloneResultMap(new Robots(), array(
'type' => 'mechanical',
'name' => 'Astro Boy',
'year' => 1952
));
// OR
$robot = \Phalcon\Mvc\Model::cloneResult(new Robots(), array(
'type' => 'mechanical',
'name' => 'Astro Boy',
'year' => 1952
));