Understandings
n. 了解( understanding的复数形式 ); 相互理解; （非正式）协议; 理解（力）
🗣️ 情景例句
Why can't you do both?
为什么不能两样一起做？
This is a camera.
这是一台照相机。
Sparks were emitted from small black boxes and red lamps flashed on and off angrily.
小黑盒子里迸出火花，红色灯泡发怒似地忽明忽暗。