@GoldenRhino23 @lisa_iannattone Or that schools aren't crowded and poorly ventilated.
@GoldenRhino23@lisa_iannattone或学校不拥挤，通风不良。
@GoldenRhino23 @lisa_iannattone Or that schools aren't crowded and poorly ventilated.
@GoldenRhino23@lisa_iannattone或学校不拥挤，通风不良。