I have now pronounced her pool-safe. The amount of water she has ingested has decreased markedly over the last two weeks.
现在我认为泳池对她很安全。在过去的两周里,她喝的水已经明显变少了。
But it's the swallowing that gets a swimmer to thinking: What's in this stuff?
但正是不断从泳池中喝水的过程让游泳者开始思考:游泳池的水里都有什么?
Swimming pool water has a distinctive odor, a chemical byproduct of chlorine interacting with body oils, sweat and urine. Yes, urine. Some bad-mannered people actually pee in pools around the world.
游泳池的水有一种独特的气味,它是由氯与人的油脂、汗水和尿液混合在一起所产生的化学物质的浓烈味道。是的,这里面有尿液。实际上,世界各地的游泳池里都有低素质的人在里面撒尿。
The amount of pee has been difficult to measure until now. Xing-Fang Li of the University of Alberta explained in February how her team did it. Instead of trying to measure pee directly, they measured the level of an artificial sweetener — acesulfame potassium, or Ace-K — which is carried in most people's urine, including in China. It's found in many foods, such as yogurt. It's not metabolized. In other words, it goes right through you, thereby providing a urine yardstick.
目前为止,尿液具体含量一直难以测量。今年2月,加拿大阿尔伯塔大学的李兴芳教授向外界解释了她的团队如何测量泳池中的尿量。研究团队没有直接测量尿液,而是测量了一种名叫乙酰磺胺酸钾(或者简短地称为Ace-K)的人造甜味剂含量。这种甜味剂在大多数人的尿液中存在,其中也包括中国人。它 Li's team collected water samples from public pools, hotel hot tubs and recreation venues and tested for Ace-K. Result: An 833-cubic-meter pool contains about 0.08 cubic meters of pee.
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