然而，如果开门的“咔哒”声是入室抢劫之类的不祥之兆，混音器可能会提高音量，提醒人们注意这个声音。

However, if the "click" of an opening door is part of an ominous action such as a burglary, the sound mixer may call attention to the "click" with an increase in volume.

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他注意到，直接用手调节收音机的旋钮来调整声音要比按住专用按钮再说“收音机——调大音量”要来得快得多。

It is much quicker to turn up the radio's volume control by hand than it is to press a special button and say "radio-raise volume," he notes.

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接听电话时，注意发音清晰，保持适中的音量，放慢语速并清晰地将意思表达出来，这样对方就能很容易地听明白你的话。

Enunciate clearly, keep your voice volume moderate, and speak slowly and clearly when answering the phone, so your caller can understand you easily.

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