Echometer
听诊器
🗣️ 情景例句
Keep it down!
小点儿声！
Sport is sweetest when there be no spectators.
旁边无观众，运动最轻松。
The sides of the deer were coloured with a reddish-brown paint.
鹿的四周用一种淡棕带红的颜色勾勒。