a group of words in a sentence that together behave as a noun名词短语
In the sentences "We took the night train" and "Do you know the man sitting in the corner?" "the night train" and "the man sitting in the corner" are noun phrases.在 We took the night train 和 Do you know the man sitting in the corner 两个句子中,the night train 和 the man sitting in the corner 都是名词短语。