How to distinguish sunny days from sunny days?

Different meanings, parts of speech, etc.

1, with different meanings: sunny is used to describe the cloudless and sunny sky in Wan Li, for example, "It's sunny, sunny and the air is fresh today". Clear refers to the situation that the air is fresh, there is no pollution and no peculiar smell. For example, "in the spring morning, the air is clear and the flowers are overflowing."

2. Different parts of speech: sunny as an adjective modifies nouns, and clear as adjectives and nouns.