Simplexes
单纯的, 单一的( simplex的名词复数 )
🗣️ 情景例句
It's about my grandfather.
是关于我爷爷。
I'm sorry,but both of them are busy right now.
很抱歉他们现在很忙。
All the students are expert drivers, but before they drive any of the buses, they will have to pass a special test.
所有的学生都是开车的能手，但在驾驶公共汽车之前，他们必须通过一项专门测验。