本文选自 The New York Times。它由表及里，再推及商用的现状。
5G的全称
fifth-generation cellular networks
语言点
shift
见每日一词37号选手shift(n.)once-in-a-decade
十年一遇
once-in-a-decade 百年一遇-
a matter of
used to refer to a small amount
a matter of days/months/years
几天/几月/几年内
The crisis was resolved in a matter of a few hours.
5G的好处：
faster networks
- let people download entire movies within seconds
- bring big changes to video games, sports, and shopping
- help spread the use of AI and other cutting-edge technologies
- AR/VR
语言点
- leap
“跳跃”
leap ahead of: 超越
Think before you leap.
三思而后行。
That's one small step for a man, one giant leap for mankind.
这是一个人的一小步，却是全人类的一大步。 - edge
见每日一词33号选手edge。
讲5G在商用领域
语言点
talk up
to describe (someone or something) in a favorable way
The saleperson talked up the car's safety features.race to do sth
“争先做某事”
They raced to get the job finished by lunchtime.follow suit
to do the same thing that someone else has just done
After one airline lowers their fares, the other airlines usually follow suit.