Duotriode
[电] 双极
🗣️ 情景例句
Let's get together sometime.
什么时候我们聚一聚。
The population of Africa is growing by leaps and bounds.
非洲的人口正在极其迅速地增长。
Every night, the man upstairs came back late.
每天晚上，楼上人回来很晚。