nature study

(in school) study of plants, animals, insects, etc （学校的）自然课.

NATO (also Nato), natter, nattily, natty, natural, natural childbirth, natural gas, natural history, natural law, natural philosophy, natural selection, naturalgas, naturalism, naturalist, naturalistic, naturalization, naturalisation, naturalize, naturalise, naturally, naturalness, nature, nature trail, naturism, naturist, naturopath, naturopathic, naturopathically, naturopathy, naught, naughtily, naughtiness, naughty, nausea, nauseate, nauseating, nauseatingly, nauseous, nautical, nautical mile, nautilus, naval,