He tried to speak, but for once, his voice had left him.

他试图说话，但这一次，他已说不出声。

《柯林斯英汉双解大词典》

The voice will, at least once, utterly convince you that your timer has stopped and you have been meditating for hours and are late for something.

至少会有一次，这个声音使你相信你的计时器已经停了，你已经冥想了好几个小时而耽误了其他事情。

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Once the specified audio file has been read in its entirety, we'll need to print out the stored spectrum information for the created voice print.

在完全读入指定的音频文件后，我们需要为创建的声波纹输出存储的频谱信息。

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She spoke from a wheelchair. Her powerful voice was heard once again at the nineteen ninety-two Democratic convention, which nominated Bill Clinton for president.

VOA: special.2010.05.09

With only 5 years left until the 2015 deadline to achieve Education for All goals, the GCE reminds the international community once again, their task of being the voice for the voiceless by increasing the frequency of their demands from governments to live up to their commitments in education.

UNESCO: EDUCATION

Initially, it may seem like a happy coincidence that programmers chose a female voice for Siri, but once you actually begin to use the software, a discomforting possibility arises.

FORBES: Siri Is Sexist

VoLTE, as the new technology is known, offers greater efficiency because once-dedicated voice space can also run data when not being used for voice calls, something the current technology doesn't allow.

WSJ: U.S. Wireless Carriers Move to New Technology��For Voice