【6】natural adj. someone’s action or something is reasonable in the circumstances自然的;things exist or occur in nature and are not made or caused by people天然的
natural economy 自然经济natural rubber 天然橡胶 【同根词】? nature n. 自然;自然界? The most amazing thing about nature is its infinite variet
y. 大自然最让人惊叹的地方在于它的无限多样性。 【应用】? Animals like to live in their ________ natural (nature) state.