Black Friday: lifetime access is on a special offer in the app, until November 30. Black Friday: special offer on lifetime access, until November 30. Download
중력파는 아인슈타인의 일반 상대성 이론에 의해 예측되었습니다.jungnyeokpaneun ainsyutainui ilban sangtaeseong iron-e uihaye yebichida.Gravitational waves were predicted by Einstein's general theory of relativity.