dr是什么意思

n.博士,医生;Distributed Refresh,分布式刷新

1、I need to make an appointment with my doctor. 我需要和医生预约。
2、She was awarded a PhD in Chemistry. 她获得了化学博士学位。
3、He drove for five hours without taking a break. 他连续开了五个小时的车。

医生；博士；行驶距离；