ThesurprisingexperimentIamabouttodescribeprovesthatairi...
問題詳情:ThesurprisingexperimentIamabouttodescribeprovesthatairisallaroundyouandthatitprovesdownuponyou.Airpressureisawonderfulforce.Whenyouswimunderwater,youcanfeelwaterpushdownyourbody.Theairallaroun...