两者都可以.
例:marvel 既可以做动词也可以做名词;
(1) We marveled that he walked away unhurt from the car accident.
他安然无恙地逃离了车祸,这让我们感到惊异.
(2) It is a marvel that he walked away unhurt from the car accident.
[与上句同义]
miracal 只做名词;
The car ran over the child,but by a miracle,he was unhurt.
汽车压着了这个小孩,但他却没有受伤,真是奇迹.
by a miracle 奇迹般地...