They have arrived in London en route to the United States.

他们在前往美国的途中已中途到达伦敦。

《柯林斯英汉双解大词典》

I take it for granted that they have arrived there already.

我想当然地认为他们早已到达那里。

youdao

Message inspector pattern - for performing XML message-related tasks entirely within the Web services tier, that is, processing messages after they have arrived at a service.

消息检查器模式，用于在Web服务层中执行所有的XML消息相关的任务，换句话说，在消息到达服务之后对其进行处理。

youdao

"Either once they have left their country and are on route, or when they have actually arrived in the country of destination, that their passports are taken way, they are locked up and then they are forced into prostitution,"

VOA: standard.2009.08.21

For many newly rich Chinese, flaunting the latest iPhone has been a way to show that they have arrived.

FORBES: Apple In Trouble If U.S. Phone Market Follows France, India, China

Immigrants are only around 12% of the population, but they have arrived in some areas suddenly and in large numbers.

ECONOMIST: Immigration

Better still, asylum-seekers find Britain easy to disappear into once they have arrived and added their application to the heap of cases pending.

ECONOMIST: The