Mainlines
n. 主线；静脉注射\\nvt. 把海洛因等毒品直接注入静脉\\nvi. 沉溺于；注入\\na. 主流的；沿干线的；传统的
🗣️ 情景例句
I am studying two majors, and it's quite a burden on my time.
我有两门主修课，这占据了我很大一部分时间。
The tongue is not steel yet it cuts.
舌头不是钢，伤人似刀剑。
People said gold could easily be picked up by washing sand from the river in a pan of water.
据说，在一盆水里淘洗可沙就很容易找到金子。