to rain lightly in fine, small drops
下毛毛雨, 细雨蒙蒙
雨轻轻细雨在人行道上，营造出一种雾蒙蒙的气氛。
to cover a stretch of land with a lot of water
淹没, 泛滥
融化的雪和冰会淹没低洼的田地，使它们无法用于耕作。
a weather phenomenon with an extensive circulation of winds around a central region of high barometric pressure that is connected with calm and fine weather
反气旋, 高压区
飞行员飞越反气旋时享受到了湍流最小的平稳条件，使得旅程愉快。
a large collection of islands or the sea surrounding them
群岛, 列岛
她参观了加拉帕戈斯群岛，看到了独特的野生动物。
a suspension of fine solid or liquid particles dispersed in a gas
气溶胶, 气溶胶
实验室研究了受控条件下气溶胶的行为。
the overflow of normally dry land by rising water
洪水, 大洪水
风暴后的大洪水冲走了整个村庄。
the tiny water drops that form on cool surfaces during the night, caused by condensation
露水, 夜间冷凝
花朵精致的花瓣上点缀着露珠，使它们看起来清新而焕然一新。
a small amount of rain, snow, etc. that moves in a quick and stormy way and lasts only for a short period of time
阵雪, 疾风
阵雨来得快去得也快。
a drastic and sudden rush of wind
阵风, 狂风
风暴随着每一次强烈的阵风加剧，使树木弯曲，碎片在空中飞舞。
a long pointed piece of ice formed by the freezing of dripping water from a surface such as a roof
冰柱, 冰凌
water in forms such as rain, snow, hail, or sleet that falls from the atmosphere to the Earth's surface
降水, 降水
该地区在旱季经历低降水量。
a period during which the weather becomes warmer causing snow and ice to melt
融化, 解冻
解冻让河流再次自由流动。
a risk to human health or to the environment caused by a biological source, especially microorganisms
生物危害, 生化危机
医疗废物的不当处理可能造成重大的生物危害，潜在地传播传染病。
a sudden, violent natural disaster that drastically alters the earth's landscape
大灾难, 自然灾害
科学家们指出，小行星或彗星的撞击是导致恐龙灭绝的大灾难的主要理论。
the act or process of making a substance or place dirty or polluted, especially by dangerous substances
污染, 玷污
该工厂因空气污染被罚款。
liquid waste or sewage discharged into rivers, lakes, or the sea
污水, 液体废物
环境法规要求工业在将废水排入湖泊和海洋之前进行处理，以防止污染。
the point on the surface of the earth vertically above the focus of an earthquake where its effects are felt most strongly
震中, 中心
救援队将他们的努力集中在震中，那里自然灾害的影响最为严重。
the calm area at the center of a storm, hurricane, or tornado
眼, 风暴眼
a small steep waterfall, usually one of several others
小瀑布
他们拍摄了隐藏在国家公园深处的瀑布的照片。
a wall built in order to stop water, especially from the sea, from entering an area
堤, 堤坝
堤坝的决口导致附近的田地完全被水淹没。
a level path, typically beside the sea or a river, that is wide and open where people may walk by for pleasure
海滨大道
the part of a river that is wide and where it meets the sea
河口, 江口
河口是淡水与海水交汇的重要生态系统。
a steep-sided valley, often with a stream running through it
峡谷, 深谷
地质学家研究了峡谷以了解侵蚀模式。
a narrow piece of land with water on each side that connects two larger areas
地峡, 狭窄的土地
古代文明经常沿着地峡定居，因为它们在贸易和防御中具有战略意义。
a structure built along a riverbank to serve as a landing place for boats or ships
码头, 泊位
商贩们沿着码头排成一行，向抵达的乘客出售商品。
one of the imaginary lines between the North Pole and the South Pole, drawn on maps to help pinpoint a location
子午线, 经线
水手们依靠子午线在海上航行，利用天体来确定他们相对于这些假想线的位置。
a muddy and wet piece of land in which it is possible to get stuck
沼泽, 泥潭
露营地靠近一片吸引各种野生动物的沼泽地。
an area of land that is flat and higher than the land surrounding it
高原, 台地
印度的德干高原是一个广阔的高地，以其肥沃的火山土壤和广泛的农业而闻名。
the highest point that a certain celestial body reaches, directly above an observer
天顶, 最高点
卫星被定位在观察者上方轨道的天顶。
relating to or resembling twilight
黄昏的, 与黄昏有关的
暮光射线穿透云层，在傍晚的天空中创造出戏剧性的效果。
connected with or produced by the heat inside the earth
地热的, 地热能的
地热泉，比如在黄石国家公园发现的那些，是由地球内部的热量加热的。
