Or who say, don't spend all your budget on a huge screen in the conference room, and then place one tiny microphone in the middle of a table for 30 people.  If you can hear me, you can understand me without seeing me. If you can see me without hearing me, that does not work.
有人说，别花太多钱 在会议室的屏幕上， 然后在30人的大桌中央 放一个微型麦克风。 如你听见我，不须看到我 也会明白我。如你只看到我却听不清我， 这是不奏效的。