a large area of land or of the world with specific characteristics, which is usually borderless
地区, 区域
land with mountains or hills
高地, 山区
苏格兰高地拥有崎岖的山脉、原始的湖泊和起伏的丘陵等令人叹为观止的景观。
land covered with many trees, especially an area smaller or less dense than a typical forest
a tropical forest with many plants growing densely
丛林, 热带雨林
丛林里充满了异域动物的声音。
a piece of land covered in grass and sometimes wild flowers, often used for hay
草地, 牧场
奶牛在草地上吃草。
a group of mountains or hills in a line
山脉, 山岭
山脉延伸至几个国家。
a natural hollow or passage in the earth, especially one with an opening to the surface
a high, steep face of rock, especially beside the sea
(of an area) having a lot of mountains
多山的, 山区的
他们在公路旅行中驾车穿过了一片多山的风景。
having a surface that is covered with large, uneven, or rough rocks, stones, or boulders
多岩石的, 崎岖的
海滩多岩石，沿岸散落着大块的巨石。
a valley that is deep and has very steep sides, through which a river is flowing usually
峡谷, 深谷
我们徒步下到峡谷去探索。
a high place, such as a cliff, from which a river or stream falls
瀑布, 飞瀑
瀑布的声音在从岩石上倾泻而下时令人感到 soothing。
land along the sides of a river, canal, etc.
岸, 河岸
the boundary between land and water, particularly as seen on a map or from above
海岸线, 海岸
风暴导致了海岸线沿线的侵蚀。
a pale brown substance that consists of very small pieces of rock, which is found in deserts, on beaches, etc.
沙子, 细沙
a long artificial waterway built for boats to travel along or for carrying water from one place to another
a wide stretch of water that connects two larger areas of water, particularly two seas
海峡, 水道
the average height of the surface of the ocean in relation to the land, measured over a specific period of time
海平面, 零海拔
由于气候变化，海平面上升是一个令人担忧的问题。
soft, wet earth, especially after rain or near water
泥, 泥土
an area under the protection of a government, where people can visit, for its wildlife, beauty, or historical sights
国家公园, 自然保护区
黄石是美国第一个国家公园。
belonging or related to the region around the North Pole
北极的, 极地的
北极动物，如北极熊和海豹，适应在冰冷的环境中生存。
