Word sense disambiguation is one of the difficult problems and a key point in natural language processing.

词义排岐是自然语言处理的重点和难点问题之一。

youdao

For a long time marginal preposition in English has been receiving little attention because of their marginal nature, but it is a difficult point in language teaching.

长期以来，英语中的边缘介词，由于其边缘性，未引起语言研究者的充分重视，但却是语言教学中的一个难点。

youdao

Reading teaching is always the focus and key point of Chinese language teaching of primary schools and middle schools, while it is always the difficult point that puzzles Chinese teachers.

阅读教学一直是中小学语文教学的核心与重点，但是它一直又是困扰中小学语文教学的难点。

youdao