natural/'nætʃərəl/

a.

➊ not made, caused or controlled by humans

➋ normal or usual

a.

➊ [仅置于名词前] 自然的，天然的：natural disasters such as floods and earthquakes 洪水及地震等自然灾害

◇a natural substance 天然物质

➋ 自然而然的，正常的：[it is natural (for sb) to do sth] It's natural for you to worry about your exam. 你担心考试是正常的。

构词nature + -al

音组-tural/-tʃərəl/

agricultural; natural