When an event occurs (a click or a mouse-over, for example) the capture phase begins.

当一个事件发生时(比如单击或者鼠标划过)，捕获阶段就开始了。

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During the capture phase, the necessary information is gathered and stored in a metadata file.

捕捉阶段收集必要的信息，并将其存储在一个元数据文件中。

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During the capture phase, the necessary information is gathered and stored in a metadata file.

捕捉阶段收集必要的信息，并将其存储在一个元数据文件中。

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