The US aviation authorities1 say2 air traffic is getting back to normal3 after domestic flights were grounded for several hours because of a computed glitch4.
析：该句的主语为“The US aviation authorities”，谓语为“say”，宾语为从句“air traffic is getting back to normal”，其后跟随由“after”引导的时间状语“after domestic flights were grounded for several hours”以及“because of”引导的原因状语“because of a computed glitch”。
1. ground 使停飞
例：The civil aviation minister ordered all the planes to be grounded.
hold sb's ground 坚守阵地；不撤退；不退却
例：It is not easy to hold your ground in front of someone with a gun.
2. computer glitch 电脑故障
例：A computer glitch fouled up their presentation.
computer software/hardware 计算机软件/硬件
例：Are you familiar with the computer software they use?
3. cyber attack 网络攻击
例：Every day seems to bring news of some new cyber attack.
launch an attack 发起攻击；发动进攻
例：The worst reason to launch an attack would be a fear of seeming irresolute.
4. deal with 对付；处理
例：He has some unfinished business to deal with.
deal out 分发；分配
例：The profits were dealt out among the investors.
5. extreme weather 极端天气
例：As global surface temperatures increase, so does the likelihood of extreme weather.
in the extreme 极其，非常，极度
例：Some of the scenes were unpleasant in the extreme.