Quadruplex
a. 四倍的, 四重的, 四路多工的, 四重信号的\\n[计] 四工系统
🗣️ 情景例句
I have just begun to learn and my serve isn't very good.
我刚刚开始学习，发球不太好。
It's about time to get up.
差不多该起床了。
No. It's in Hubei.
不是，是在湖北。