ambient level的用法和樣例：
例句
- The level at the reference point is zero.
參考點的電平是零。 - A condenser microphone always has the same output level as a dynamic microphone.
電容話筒的輸出電平和動圈話筒一樣高。 - First we have to lift the level of instruction.
首先我們得提高教學水平。 - We are shooting for a higher production level.
我們正力爭提高生產水平。
