英语听力：自然百科 佛罗里达州的温泉（一）
时间：2018-12-26 作者：英语课 分类：自然百科2009年
英语课
Why does Florida have so many springs? Florida sits on a layer of porous 1 limestone 2 which acts as an underground reservoir or aquifer 3. This aquifer can absorb huge amounts of water. Where the pressure is great enough, springs bubble up, spewing up billions of gallons of fresh water everyday. Other springs barely ripple 4 the sand.
This is water as perfect as it comes, pure enough for locals to drive a hole in the ground and drink. The source is rain. The rain embarks 5 on a long journey which will take it underground, then eventually turn it into spring water.
Nearly all rivers in Florida run underground. When it rains, the water absorbs acids from plants and soil. These acids dissolve the limestone bedrock, opening up new cavities, forming tunnels below.
Underground, the water releases its minerals drop by drop, forming stalactites. Entering this underworld, one is transported to a wholly different place, it is not teeming 6 with life, it's as dark and still as the moon. These tunnels are among the last explored places on earth. Divers 7 daring and able enough are lured 8 in search of the unknown. Their risks have paid off. These tunnels in caves have offered up some amazing discoveries, like this blind cave crayfish. Scientists have determined 9 that they can live here for more than 100 years, 20 times longer than their surface cousins. No one can explain why.
1 porous
adj.可渗透的，多孔的
- He added sand to the soil to make it more porous.他往土里掺沙子以提高渗水性能。
- The shell has to be slightly porous to enable oxygen to pass in.外壳不得不有些细小的孔以便能使氧气通过。
2 limestone
n.石灰石
- Limestone is often used in building construction.石灰岩常用于建筑。
- Cement is made from limestone.水泥是由石灰石制成的。
3 aquifer
n.含水土层
- An aquifer is a water-bearing rock stratum such as sandstone and chalk.地下蓄水层是一些有水的岩石层，如沙岩和白垩岩。
- The wine region's first water came from an ancient aquifer.用来灌溉这个地区葡萄园的第一批水来自古老的地下蓄水层。
4 ripple
n.涟波，涟漪，波纹，粗钢梳；vt.使...起涟漪，使起波纹； vi.呈波浪状，起伏前进
- The pebble made a ripple on the surface of the lake.石子在湖面上激起一个涟漪。
- The small ripple split upon the beach.小小的涟漪卷来，碎在沙滩上。
5 embarks
乘船( embark的第三人称单数 )； 装载； 从事
- Patricia is a free-spirited girl who embarks on an erotic odyssey. 翠茜亚是个任性少女、毅然踏上一次性爱之旅。
- Passenger train driver: Punctually embarks. 客车司机：准时出发。
6 teeming
adj.丰富的v.充满( teem的现在分词 )；到处都是；（指水、雨等）暴降；倾注
- The rain was teeming down. 大雨倾盆而下。
- the teeming streets of the city 熙熙攘攘的城市街道
7 divers
adj.不同的；种种的
- He chose divers of them,who were asked to accompany him.他选择他们当中的几个人，要他们和他作伴。
- Two divers work together while a standby diver remains on the surface.两名潜水员协同工作，同时有一名候补潜水员留在水面上。
8 lured
吸引，引诱（lure的过去式与过去分词形式）
- The child was lured into a car but managed to escape. 那小孩被诱骗上了车，但又设法逃掉了。
- Lured by the lust of gold,the pioneers pushed onward. 开拓者在黄金的诱惑下，继续奋力向前。
9 determined
adj.坚定的；有决心的
- I have determined on going to Tibet after graduation.我已决定毕业后去西藏。
- He determined to view the rooms behind the office.他决定查看一下办公室后面的房间。