2. Explain that when you are about to fall asleep or just wake up, your eyes are half open and half closed, and things are blurred. For example, when he was asleep or just woke up, his eyes were blurred. Ambiguity in literature means that words contain multiple uncertain meanings.
3. Distinguish between obscurity and obscurity. The former refers to the approximate shape of an object blurred by distance. Dream _ means that your eyes are blurred because you are sleepy. Describe when you are about to fall asleep or just wake up, or when you are half open and half closed, you can't see clearly.