The local PTA raised 200,000 RMB ($33,000 USD) to buy air purifiers so that her children can at least enjoy clean air inside the school where recess is often cancelled because of smog.
当地的家庭教师协会（PTA）募集了人民币200，000元（约合33，000美元）购买空气净化器，这样一来，尽管因为雾霾而经常取消户外活动，但孩子们至少可以在学校里呼吸到清洁空气。
The gas inside the rubber ball is extruded out via the opening and a round recess is arranged at the periphery of the tongue surface opening.
橡胶皮球内的气体可通过该开口挤压而出，在舌面开口的周围有一圆形凹陷。
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