Insummer,millionsofpeoplewillheadforthebeach．Andwhile...
問題詳情： Insummer,millionsofpeoplewillheadforthebeach．Andwhiletheoceancanbeagreatplacetoswimandplay,itmayalsobeusefulinanotherway．Somescientiststhinkthatwavescouldhelpmakeelectricity． “Haveyouever...