蓝牙为什么叫"蓝牙"？

Bluetooth is a way to connect things without wires. 蓝牙，是一种不用线就能连接设备的技术。 Its name comes from a real king. 它的名字，来自一位真实存在的国王。 King Harald lived over a thousand years ago. 哈拉尔德国王，生活在一千多年前。 He was called ”Bluetooth” because of his tooth. 他因为一颗坏牙，被叫做”蓝牙”。 He united many small kingdoms in the north. 他把北方许多小国统一了起来。 Bluetooth technology also brings things together. 蓝牙技术，也把很多设备连在了一起。 A king's nickname became a famous tech name. 国王的外号，成了响当当的科技名字。