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Maybe you carry the most powerful passport in the world, or perhaps the rarest passport.
也许你的护照是世界上最强大的，也许是最稀有的。
Whatever the case, your passport will likely be one of four colors: red, blue,green or black, although there are slight variations.
无论如何，你的护照可能是四种颜色中的一种:红、蓝、绿或黑，虽然可能有细微的变化。
Switzerland's passport is dark red, for example, while most European countries prefer a shade of red. That's almost brown.
例如，瑞士的护照是深红色的，而大多数欧洲国家更喜欢接近棕色的红色。
There are no official rules regarding passport colors, but countries follow a certain set of norms when designing them.
护照的颜色没有官方规定，但各国在设计护照时都遵循一定的标准。
The International Civil Aviation Organization, which works to define the principles of air travel, suggests that countries use a suitable type, size and style for official documents like passports.
国际民用航空组织(International Civil Aviation Organization)致力于定义航空旅行的原则，该组织建议各国对护照等官方文件使用合适的类型、大小和风格。
There are also a few compulsory aspects of passports. They must be made from a material that bends.
护照也有一些强制性的要求。它们必须由能弯曲的材料制成。
They should be able to be read by a machine at temperatures ranging from 10 degrees Celsius to 50 degrees Celsius, under the conditions where the air can be extremely dry or moist.
它们应该能够承受10摄氏度到50摄氏度的温度，在空气极其干燥或潮湿的条件下可以被机器读取。
Despite these existing recommendations, there is nothing regarding the cover color. Why?
尽管已有这些建议，但没有任何关于封面颜色的建议。为什么?
Simply put, countries stick to darker and more conservative colors because they appear more official. And they can also hide dirt and wear.
简单地说，国家坚持使用更暗、更保守的颜色，因为它们看起来更正式。
While there's little innovation when it comes to passport cover color, the same cannot be said for the pages.
它们还可以隐藏污垢和磨损。虽然护照在封面上的颜色没有什么创新，但页面上就不一样了。
The passports of many countries can take images of their well-known geographical features and wildlife, which also function as security features as some are only visible under a special light.
许多国家的护照照片可以是他们著名的地理特征和野生动物，这些照片也可作为安全特征，因为有些只有在特殊的光线下才能看到。
Questions 22 to 25 are based on the passage you have just heard.
请根据你刚刚听到的文章回答问题22到问题25。
Question 22: What do we learn about most European passports?
问题22：关于大多数欧洲护照，我们知道了什么?
Question 23: What does the passage say about the design of passports?
问题23：关于护照设计，文章说了什么?
Question 24: Why are dark colors chosen for passport covers?
问题24：为什么护照封面选择深色?
Question 25: What is one special function of the images inside many passports?
问题25：许多护照内的图像有什么特殊功能?
