Once you have the black boxes, the next key step is to connect them together into an overall integrated application.

一旦您拥有这些黑盒，接下来的关键步骤就是将它们连接起来构成完整的应用程序。

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Most often this feature is ignored, and password text boxes simply record key-press events and ignore key-release events.

这项功能经常被忽略，并且密码文本框只记录按键事件而忽略释放事件。

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Other boxes represent functions performed by custom components (see the diagram key).

其他框表示由自定义组件执行的功能(请参见图表说明)。

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Armored vehicles patrol Srinagar's center, and brick sentry boxes and checkpoints stand at key street corners.

CNN: ASIANOW - TIME Asia

These products of Hakone are exquisitely designed wooden boxes with inlaid intricate images in complex patterns that mask the secret panels that are the key to eventually gaining access to the contents inside.

FORBES: Japanese Secret Boxes: The Coolest Security Puzzles for Kids and Adults