The fall of a leaf is enough to tell us that autumn is coming-a straw shows the direction of the wind.
[
yī
used at the end of a sentence
zhī
air
]
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[
yī
used at the end of a sentence
zhī
air
]
Knowing the arrival of autumn from the falling of a leaf. Metaphor through individual subtle signs, we can see the development trend and results of the whole situation.