Vu̍t-chṳt

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hi-thí, yi̍t-thí lâu ku-thí.

Vu̍t-chṳt (物質) chhai khô-ho̍k ke thin-ngi hàn-màng khok-thin, yit-pân he chṳ́ put-pien chṳt-liong (不變質量) m̀ he 0 ke tûng-sî. Vu̍t-chṳt ya cho-tet yung-lòi thúng-chhṳ̂n só-yû voi phî ngìn khon to ke vu̍t-thí ke sṳ̀n-fun.