Housed within the system unit, a sound card contains connectors that project from the back of the computer so that you can attach speakers, headphones, and a microphone.
声卡安装在系统机箱内，它在计算机后面有一些突出的接口，可供用户将扬声器、耳机和麦克风插在上面。
2
A decibel is a standard unit of sound, and normal conversation is around 60 decibels.
分贝是声音的标准单位，正常谈话的声音大约在60分贝左右。
3
But we always make sure we put it there, because when you click on the unit, it's the portrait and the little sound cues that give them character.