Echolucent
[医]无回音区
🗣️ 情景例句
It's important for you to keep a cool head at this moment.
这时候保持头脑冷静是很重要的。
Reading and listening to music is the ultimate in relaxation.
一面读书，一面听音乐是最佳的休息。
There is a new type of machine which can produce colour copies.
有一种新型的机器能够制作出彩色复印件。