- 問題詳情: Insummer,millionsofpeoplewillheadforthebeach.Andwhiletheoceancanbeagreatplacetoswimandplay,itmayalsobeusefulinanotherway.Somescientiststhinkthatwavescouldhelpmakeelectricity. “Haveyoueverbeenonasurfboardorboatandfeltyourselfbeingliftedup...
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