2700千米英语怎么说呢？这个单位是采用国际单位制，一般简称“千米”，用英文表达是kilometer。来源于希腊语中的"khipa"和"metron"，分别表示“千”和“测量”。
例句：
The Earth's equator is approximately 40,075 kilometers long. 大约等于2700千米。
The fastest human can run a kilometer in about 2-3 minutes. 最快的人大约能跑完一千米需要2-3分钟。
A pght-year is a unit of distance used in astronomy, equal to the distance that pght can travel in one year, which is approximately 9.46 trilpon kilometers. 光年是天文学中一种距离单位，相当于光在一年内能够行走的距离，约为9.46万亿千米。