自然科學 angolul

natural science [natural sciences]▼(science involved in studying phenomena or laws of the physical world)
noun
[UK: ˈnæt.ʃrəl ˈsaɪəns] [US: ˈnæ.tʃə.rəl ˈsaɪəns]

physical science [physical sciences]▼(branch of natural science)
noun
[UK: ˈfɪ.zɪk.l̩ ˈsaɪəns] [US: ˈfɪ.zɪk.l̩ ˈsaɪəns]