책 Solutions - 기초 - 문화 6

a valley that is deep and has very steep sides, through which a river is flowing usually

협곡, 계곡

a trip that has been organized for a particular purpose such as a scientific or military one or for exploration

원정, 탐험

very unusual, special, or surprising

비범한, 특별한

an area containing still water that is comparatively smaller than a lake, particularly one that is made artificially

연못, 못

to prevent someone or something from being damaged or harmed

보호하다, 지키다

a range of things or people with the same general features but different in some details

다양성, 유형