Undersoil
n. 底土, 下层土
🗣️ 情景例句
Very splendid. How about patent rights?
很不错。它的专利权怎么样呢？
I subscribed to a lot of periodicals last year.
去年我订了许多期刊。
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。