When overridden in a derived class, asynchronously passes a message from a source block to this target block.

在派生类中重写后，异步地将消息从源块传递至该目标块。

youdao

When overridden in a derived class, asynchronously passes a message from a source block to this target block.

在派生类中重写后，异步地将消息从源块传递至该目标块。

youdao