Aac
abbr. 自动振幅控制（automatic ampltiude control）
🗣️ 情景例句
He's 20 kilos overweight for his height.
就他的身高而言，他的体重超了20公斤。
We can offer door-to-door delivery services.
我们可提供送货上门服务。
A telescope would have to be as far away as the planet Jupiter to look for life in outer space, because the dust becomes thinner the further we travel towards the outer edges of our own solar system.
望远镜要放置在木星那样遥远的行星上才有可能在外层空间搜寻生命。因为我们越是接近太阳系的边缘，尘埃就越稀薄。