The next block should look familiar: It prints a usage message if no arguments are provided.

下一个块应该是非常熟悉的：它在未提供参数时打印用法信息。

youdao

This provides the basic definition of a message, which ACTS as a container holding address, payload, and flags to send and block for a message.

它提供消息的基本定义，它充当一个容器来容纳消息的地址、有效负载及关于发送和阻塞的标志。

youdao

The third block displays a confirmation message.

第三个块显示确认消息。

youdao

We also saw a brief demo of the prototype application, and sure enough, it showed us when an LED block was placed backwards with an error message -- you can see it in action in the video below.

ENGADGET

If an advertiser chooses to merely block and tackle, lacking human relevance, his message will die a quick death.

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Last week somebody defaced one of Ms. Ketcham's fliers, scratching out its message and scribbling NO on it in block letters.

WSJ: There's Lots of Yelling in This Campaign