【英语时差8,16】人工海浪池

 For those lucky enough to live on either coast, going to the beach and frolicking in the ocean waves is a favorite summertime activity. Faced with the reality of an oceanless existence, inhabitants of the landlocked, flyover¹ states came up with the ultimate substitute: the wave pool.   

In the ocean, waves occur when wind pushes against the surface of the water. Water molecules² pushed forward by the wind at a certain point push against the molecules in front of them, and so on. The collective pushing of all those molecules results in waves.

 

Creating waves artificially in a relatively³ small, contained body of water works on the same basic principle. Something is used to push on the water at the deep end of the pool to create waves. Most serious wave pools use a reservoir system that uses huge amounts of stored water to create the necessary push.

 

Reservoir pools have four basic parts: a water pumping system, a reservoir to hold the water, release valves at the bottom of the reservoir, and a canal at the shallow end of the pool to return water to the pumps. The pumps draw the water into the reservoir, which in large wave pools can hold up to 90,000 gallons. When the reservoir is full, the release valves open, dumping the water into the calm, motionless water of the pool. The sudden influx⁴ of so much water, like a strong wind, pushes the pool's water forward, creating a sizeable wave. When the wave washes up at the front of the pool the canal channels the extra water back to the pumps, and the process begins again.  

1 flyover   

n.立交桥，天桥

参考例句：

• It took workers more than one year to build this flyover.建造这座立交桥破费工人一年多时间。
• All that came to his bakery should go over a flyover first.所有来他店的人都必须先经过一座立交桥。

2 molecules   

分子( molecule的名词复数 )

参考例句：

• The structure of molecules can be seen under an electron microscope. 分子的结构可在电子显微镜下观察到。
• Inside the reactor the large molecules are cracked into smaller molecules. 在反应堆里，大分子裂变为小分子。

3 relatively   

adv.比较...地，相对地

参考例句：

• The rabbit is a relatively recent introduction in Australia.兔子是相对较新引入澳大利亚的物种。
• The operation was relatively painless.手术相对来说不痛。

4 influx   

n.流入，注入

参考例句：

• The country simply cannot absorb this influx of refugees.这个国家实在不能接纳这么多涌入的难民。
• Textile workers favoured protection because they feared an influx of cheap cloth.纺织工人拥护贸易保护措施，因为他们担心涌入廉价纺织品。