spontaneity [ˌspɔntə'ni:iti]

以下由轻松背单词网站提供

附加级

n.自发性

His enthusiasm was somewhat lacking in spontaneity,I thought. 我觉得他的热情有点勉强，缺乏自发的冲动。
He had the spontaneity of a child. 他有着孩童般的率性。