interstellar a. 星际的
例句 New stars form in the interstellar gas of spiral galaxy. 新的行星在螺旋状星系的星际气体中形成。
invertebrate n. 无脊椎动物 a. 无脊椎的
例句 Evaporation caused salinity increase and the extermination of scores of invertebrate species as the consequence. 蒸发使盐度上升，从而导致大量无脊椎动物的灭绝。
同类 vertebrate 脊椎动物;plankton 浮游生物;microbe 微生物;saprophage 腐食者
latitude n. 纬度;[常 pl.]纬度地区
例句 1. The glacial system was managed by precipitation and temperature so glaciers cannot form in temperate latitudes. 冰川系统由沉淀物和温度来控制，因此冰川不能在温带地区形成。
2. Every aurora hangs as a curtain of light stretching over the polar regions and into the higher latitudes. 一束束极光像帘幕一样悬挂在极地上空，并延伸到高纬度地区。
同类 其他表示地理位置的单词还有：longitude 经度;altitude 高度
lava ]n. 岩浆，熔岩
例句 1. The largest center of this area was seriously affected by a volcanic eruption with much of its agricultural land covered by lava. 该地区最大的中心受到了火山喷发的严重影响，大量的农田被火山岩浆覆盖。
2. The molten lava which flows out of volcanoes killed a mass of plants and animals. 从火山中流出的熔岩杀死了大量的动植物。
同义 magma(n. 熔岩)
layer n. 层，层次
例句 1. It is not enough to supplement a thick layer of insulating blubber for whales. 这不足以为鲸鱼提供一个厚厚的隔热脂肪层。
2. The filling is a soft layer of wool which has already been cleaned. 填充物是一层已经清理过的柔软羊毛。
要点 layer虽然有“层次”的意思，但在托福阅读中通常取其“地层”的含义，比如：The gypsum layer contained tiny marine fossils。
leak v.(使)渗出;(使)泄漏 n. 漏洞;泄露
搭配 leak out 泄露
例句 To study the changes in lake levels, what seeps into the lake from the groundwater and what leaks into the groundwater should be taken into consideration. 要研究湖泊水位的变化，从地下水渗入到湖中的水量以及从湖中渗出到地下水中的水量都要考虑进去。
leatherback[n. 棱皮龟，革龟
例句 An adult leatherback is double the size of the biggest sea turtles, so they will take longer time to cool their bodies off. 成年革龟的体型是最大的海龟的两倍，所以它们需要更长时间使身体冷却下来。
limestone[]n. 石灰石
搭配 limestone cave 石灰岩洞
例句 Water from limestone and sandstone aquifers is more suitable to drink than water from sand and gravel aquifers. 来自石灰岩和沙岩层的水比来自砂石和碎石层的水更适于饮用。
longitude[]n. 经度;经线
搭配 longitude zone 经度带
例句 1. How to determine longitude was a problem that wasn't solved until the eighteenth century. 如何测量经度的问题直到18世纪才得以解决。
2. There are satellites that sending out signals and the signals containing important information that can be used to determine the longitude, latitude and elevation at any point on the Earth. 有许多卫星都在发射信号，而这些信号都包含着重要的信息，可以用来确定地球上任意一点的经纬度和海拔。
loose[]a. 松散的;不精确的;不牢固的;自由的
例句 A proportion of the total volume of loose sediment formed an empty space. 占总体积一定比例的松散沉积物形成了一个真空的空间。
同义 unstable(a. 不牢固的)
派生 loosen(v. 放松);loosely(ad. 宽松地)
lump n. 块;肿块 v. 将…归并在一起;形成块状
例句 When lumps of nebular dust were fused at extremely high temperatures and then quickly cooled, chondrules were formed. 当块状的星云尘埃在极高温下熔化，然后又被迅速冷却时，陨石球粒就会形成。
同义 piece(n. 块)
mammal n. 哺乳动物
例句 1. Around 90 percent of modern humans are right-handed, and human is the only mammal that uses one hand. 大约有90%的现代人是右利手，而人类是唯一有使用某只手习惯的哺乳动物。
2. Desert-adapted mammals have the capacity to live normally even they are in extremely dehydrated state. 适应了沙漠生活的哺乳动物拥有在极度脱水的情况下仍能正常生存的能力。
marine[]a. 海的;海生的
搭配 marine animal 海洋生物
例句 1. The dead leaves of this plant are a kind of food for a wide variety of marine organisms. 这种植物的落叶对于很多种类的海洋生物而言是一种食物。
2. The coastal region has a wet gentle marine climate. 沿海地区有着湿润的温带海洋性气候。
maritime a. 海的;航海的;沿海的
例句 1. With the development of maps, navigational instruments and a maritime code of conduct, long distance navigation becomes possible. 地图、航海仪器以及海上行为准则的发展使远程航海成为可能。
2. The settling on the Pacific Islands is one of the greatest merits of maritime colonization in human history. 在太平洋岛屿上定居是人类海洋殖民历史上最伟大的壮举之一。
marsh n. 沼泽，湿地
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