进一退二法倍投图片简介：The weather in autumn is occasionally sultry. The fan in the classroom slowly rotates its blades, and the agitated airflow turns up again, which seems to be useless in the sultry air.
The weather in autumn is occasionally sultry. The fan in the classroom slowly rotates its blades, and the agitated airflow turns up again, which seems to be useless in the sultry air.
