开罗 is the Chinese name for Cairo, the capital city of Egypt. It is the standard term used when referring to the city in any context.
开罗是埃及最大的城市。
kāiluó shì āijí zuì dà de chéngshì.
Cairo is the largest city in Egypt.
我们在开罗住了三天,参观了很多古迹。
wǒmen zài kāiluó zhù le sān tiān, cānguān le hěn duō gǔjì.
We stayed in Cairo for three days and visited many historical sites.
从开罗出发去金字塔大概要一个小时。
cóng kāiluó chūfā qù jīnzìtǎ dàgài yào yī ge xiǎoshí.
It takes about an hour to get to the pyramids from Cairo.