您要查找的是不是：
- a unidirectonal flow; a unidirectional antenna; a unidirectional approach to a problem. 单向流速；单向天线；解决问题的唯一方法。
- a unidirectional antenna 一种单向天线
- Reception improved because of the new antenna. 接受效果因有新天线而得到改善。
- unidirectional antenna 单向天线
- No antenna, no radio, we're back in the nineteenth century! 没有天线，没有无线电，我们回到十九世纪了。
- You should fix the television antenna before receiving programs. 接收节目前，你应该先装天线。
- The reception is very poor. Let me adjust the antenna. 接收效果太差了。让我来调一下天线。
- The reinforcement was unidirectional. 增强是单方向的。
- Channels can be unidirectional or bidirectional. 通道可以是单向的或双向的。
- An electrical system fed by unidirectional voltage. 由直流电压供电的系统。
- First this is an unidirectional adjustment. 首先这是一次单向调节。
- Extend the telescopic antenna vertically. 竖直地伸张伸缩式天线。
- He said he would head the antenna with a ball. 他说他还要给天线安个圆头。
- He erected a television antenna on the roof. 他在房顶立了电视天线。
- They erected a television antenna on the roof. 他们在屋顶上架起了电视天线。
- The headphone cord functions as the FM antenna. 耳机导线也具有FM天线的功能。
- Conversion of alternating to unidirectional current. 整流交流电转变到单向电流
- Marconi patents his directive horizontal antenna. 马可尼获得定向水平天线专利权。
- That is where adaptive antenna arrays come in. 这正是适应型阵列天线的切入点。
- Events in the world undeniably form a unidirectional sequence. 无可否认的，世界上发生的事件只有单向的顺序。
