Message sending is usually asynchronous, although it is easy to build synchronous calls as well and some actor implementations provide those as a feature.

消息的发送通常是异步的，尽管构建同步调用也很简单，而且有些 actor 实现提供这样的特性。

youdao

The realization of workflow engine is discussed from the following aspects: the assigning of workflow model, route selection, message sending and supervising management.

从流程分配、路由选择、消息发送及监控管理方面详细分析了工作流引擎的实现机制。

youdao

An expert believes that by rewarding kids, parents are sending a message that work isn't important unless you can get something.

一位专家认为，通过奖励孩子，父母在传递这样一个信息：除非你能得到一些东西，否则工作并不重要。

youdao

Lincoln showed Fox a message he was sending to Governor Pickens in South Carolina.

VOA: special.2009.08.06

Sending and receiving money by text message.

VOA: special.2010.05.03

"The American people had a victory in Massachusetts. And they were sending us the message stop and start over,".

VOA: standard.2010.01.24

But the prosecution of Mr Drake and others like him smacks more of vindictiveness and message-sending than justice.

ECONOMIST: Government transparency: The best disinfectant | The

That is a message worth sending.

ECONOMIST: Corruption

Whilst many of us have been caught out sending private emails to the wrong people, or have even regretted sending a tweet the next morning, it seems Mr Huhne mistook the form of the message he was sending.

BBC: Chris Huhne's fingerprints on mis-tweet