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在一次科技展览会上展出一种奇妙的粉末,将它撒在盛有海水的杯子里,稍许搅拌一下,这海水就能喝了。这种粉末就是离子交换树脂,它对跳伞到海里的飞行员来说,是救生的必需品。离子交换树脂的发明,解决了人们在两千多年前提出的老问题:“有什么办法能从海水中得到淡水?”
A wonderful powder was exhibited at a science and technology fair, and it was sprinkled in a cup filled with sea water. The water was drunk when it was stirred a little. This powder is an ion exchange resin and it is a necessity for lifesaving pilots who jump into the sea. The invention of ion-exchange resin has solved the old problem that people raised more than two thousand years ago: “Is there any way to get fresh water from seawater?”