引用一个动态变量

for ($count = 1; $count <= 5; ++$count) {
  $test = ${'node->field_aw_score_' . $count}[LANGUAGE_NONE][0]['value'];
  echo $test;
}

抛出错误:

Notice: Undefined variable: node->field_aw_score_1
Notice: Undefined variable: node->field_aw_score_2
Notice: Undefined variable: node->field_aw_score_3
Notice: Undefined variable: node->field_aw_score_4
Notice: Undefined variable: node->field_aw_score_5

然而，变量确实存在。我想参考:

$node->field_aw_score_1[LANGUAGE_NONE][0]['value']

$node->field_aw_score_2[LANGUAGE_NONE][0]['value']

等。一个动态变量。我做错了什么?谢谢。