These grammars are active in the recognition engine and define the set of words the engine returns to the application (the voice browser) when the audio is decoded and analyzed.

这些语法在识别引擎中是活动的，它们定义当对音频进行了解码和分析后该引擎返回给应用程序的词集。

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Shut down systems when only 15-minute E-mail checks are active, or when a streaming audio connection is left playing in mute for hours.

当计算机中只有历时15分钟的电子邮件检查处于活动状态时，或者如果流音频连接在几个小时内一直处于静音播放状态，则关闭系统。

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One phone was turned off, while the other had an active call going for 50 minutes. It was muted to prevent the audio from having effects on brain activity.

其中一部手机处于关机状态，而另一部手机保持通话状态50分钟，不过这部手机被调成了静音模式以防止声音本身对脑部活动有影响。

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The malware can steal data and social-network conversations, take snapshots of computer screens, penetrate across networks, turn on a computer's microphone to record audio and scan for Bluetooth-active devices.

WSJ: Cyberattack Hits Iranian PCs

The active speakers harness an array of high-end components to deliver expansive audio performance from very compact constructions.

ENGADGET: Bang & Olufsen launches BeoLab 15 in-wall speakers for stealthier beats (update: ears-on)

"U.S. retail sales for active noise cancelation headphones have doubled in the last three years, but audio performance has always been compromised in the pursuit of ANC technology, " said Minarik.

ENGADGET: Polk enters the headphone game with sporty, generic ear-speakers