30. Your blood is blue before its oxygenated
你的血液在氧化前是蓝色的
While many believe that de-oxygenated blood is blue, it is actually a myth because human blood is always red - although the level of redness does differ depending on how oxygenated it is.
很多人都会认为去氧血是蓝色的,这是错的,因为人类血液永远会是红的,而红色的程度则取决于不同的含氧量。
31. A goldfish has a memory span of three seconds
金鱼只有三秒钟的记忆
This is not true as goldfish do actually have very good memories for fish. They can be trained to respond various ways to certain colours of light, different kinds of music and other sensory cues.
这实际上不是真的,金鱼是一种记忆力很好的鱼,经过训练它们能对特定颜色的光、不同种类的音乐和其他感官信号做出各种反应。
32. You need to wait an hour after eating before you can swim safely
你吃饭一小时后游泳才安全
As with any exercise after eating, swimming right after a big meal might be uncomfortable, but it won't cause you to drown. However, it is good advice to stay out of the pool right after a big meal as the digestive process does divert the circulation of the blood towards the gut and to a certain extent, away from the muscles, meaning swimming could feel harder.
与其他任何运动一样,大餐一顿之后马上游泳可能使胃会不舒服,但这不会使你溺水。然而,它确实值得注意,当大餐一顿后,消化过程在一定程度上确实将一部分血液循环从肌肉转移到肠道,这就意味着游泳会感觉到困难。
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