The difference between Class E and A airspace is that in Class A, all operations are IFR, and pilots must be instrument-rated, that is, skilled and licensed in aircraft instrumentation.

E 级和 A 级空域的区别在于，在 A 级空域，所有操作都需遵照仪表飞行规则，飞行员必须要有仪表等级，也就是说，要有操作航空仪表方面的技术和执照。

youdao

All operations are synchronous.

所有操作都是同步的。

youdao

Identify a property that will be present in all operations.

指定将出现在所有操作中的属性。

youdao

(OMITTED) "I remain determined that our Afghan National Security Forces will be responsible for all military and law enforcement operations throughout our country by 2014."

VOA: standard.2010.07.20

We've talked about data, we've talked about operations, and we've talked about commands or statements. All right?

我们学习过操作，我们还学习过,命令或者说是声明了，对不对？

麻省理工公开课 - 计算机科学及编程导论课程节选

We know what all those operations mean now.

我们已经明白了这些运算的含义

耶鲁公开课 - 基础物理课程节选

Over time he ran everything from district sales to global marketing to overseeing all operations.

FORBES: The UnCarly

Freeport has suspended all operations at the mine out of respect for the workers killed, the company says.

BBC: Freeport's Grasberg copper mine

All operations by international special forces in the province have also been ordered to stop with immediate effect.

BBC: File image of US soldier in Wardak province, Afghanistan