#全国公共英语PETS－2精品阅读4 搜索结果
Timetravelisclearlyatrickierpropositionthanspacetravel,though.Putsimply,Einstein'sideawasthateveryobjectintheuniversehasit'sown“time”,andthesevaryasobjectsmove.Thefasteranobjectmoves,thesloweritstimeis,pa
