Gian no thoi gian
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<timefyi-glossary slug="time-dilation"></timefyi-glossary>Định nghĩa
Hien tuong duoc du doan boi thuyet tuong doi cua Einstein, trong do thoi gian di cham hon doi voi cac vat the dang di chuyen voi toc do cao hoac trong cac truong trong luc manh hon. Cac ve tinh GPS phai tinh den hieu ung nay.