ambient level

• 背景电平

ambient level的用法和样例：

例句

1. The level at the reference point is zero.
   参考点的电平是零。
2. A condenser microphone always has the same output level as a dynamic microphone.
   电容话筒的输出电平和动圈话筒一样高。
3. First we have to lift the level of instruction.
   首先我们得提高教学水平。
4. We are shooting for a higher production level.
   我们正力争提高生产水平。