Short-wave radio uses the 20-50 metre band.
短波收音机用的波段是20–50米。
The software then uses Bluetooth, the short-range radio technology built into many mobile phones, to check whether any friends or other members with similar interests are within 20 metres.
这个软件可以通过蓝牙技术以及短程无线电技术作用到手机上，去检测在我们周围的20米内有没有和我们兴趣相投的朋友。
Using data from RAJAR, a ratings agency, Enders Analysis calculates that the average 15- to 24-year-old radio listener tunes in for almost 20% fewer minutes now than five years ago.
然而来自RAJAR（评级机构）出具的恩德斯调查报告显示，年龄段在15到24岁听众收听广播的平均时间比五年前下降了几乎20%。
Theseestimates are from an analysis of more than 20 different sources ofinformation, from very old (newspapers and books) to very new (portablecomputer games, satellite radio, and Internet video).
这些估计是从原先的20多个不同信息源的分析，很旧的（报纸，书籍）非常新（便携式电脑游戏，卫星广播和互联网视频）。
Forty percent of small businesses surveyed say they now leverage Facebook as their sole marketing channel, followed by newspapers (21%), the yellow pages (20%) and local radio (7.5%).
被调查的小型企业中有40%表示他们如今使用Facebook作为唯一的营销渠道，随后是报纸(21%)，黄页(20%)和当地广播电台(7.5%)。
Worse still, after about 20 minutes after the ship takes off, all radio contact between ship and earth will be destroyed.
更坏的是，当飞船起飞20分钟后，所有飞船与地球的无线电通讯都被切断。
Commercial radio could die out within 15 to 20 years as advertising revenues dwindle, the MediaGuardian Changing Media Summit heard today.
今天“MediaGuardian变化的媒体”峰会上传出消息，商业电台可能在15年至20年因广告收入减少而倒闭。
Select the Queue radio button to specify the destination type (Figure 20).
选择Queue单选按钮，以指定目的地类型(图20)。
In the pop-up window, enter "Password" in the Name field, "20" in the Columns field, "20" in the Maximum length field, select the Password radio button, and click OK.
在弹出式窗口的Name字段、columns字段和Maximumlength字段里分别输入“Password”、“20”和“20”，然后选择Password单选按钮并单击ok。
Investors look to the 20 million subscribers at both Netflix and Sirius XM Radio as signs that consumers are willing to pay for streaming content.
投资者认为Netflix和SiriusXMRadio的两千万订阅用户标志着消费者愿意为串流内容付费。
Simulations show that average positioning error less than 21% of nodes' radio range in a scenario where an average connectivity is 8 and anchor nodes is 20.
仿真实验显示，在网络连接度为8、参考节点数量为20的情况下，平均定位误差小于节点射频通信距离的21%。
The Internet makes the world smaller, we can know the instant news quickly. 20 years ago, we only have TV and radio to get the news, but now, we have computer and cellphone.
网络让世界变得更小，我们可以快速了解即时信息。20年以前，我们只有通过电视和收音机来收看消息，但是现在，我们拥有了电脑和手机。
But I am not on too many shows. 6 talk shows and maybe about 20 radio shows?
但是，我并没有太多的表演。6个访谈节目，也许大约20电台节目？
An antenna device (20) includes an antenna (21) for receiving a time information radio wave, and an antenna support member (22).
一种天线装置(20)，包括天线(21)用于接收时间信息无线电波，还包括天线支撑部件(22)。
Article 17 the hourly total allowed for advertisements on each program of radio and television stations should be no longer than 20% of the program's broadcast duration each day.
第十七条广播电台、电视台每套节目每天播放广播电视广告的比例，不得超过该套节目每天播出总量的20%。
Article 20 Radio and television stations should control advertisements of wines and liquors strictly abide by state's relevant regulations.
第二十条广播电台、电视台应当严格按照国家有关规定控制酒类广告的播出。
The results showed that:(1)The mean clear time of radio-contrast on OA knees was 35 minutes, and that on normal knees was 20 minutes;
结果发现：（1）患者组骨内造影剂平均排空时间为35分钟，正常组为20分钟；
The results showed that:(1)The mean clear time of radio-contrast on OA knees was 35 minutes, and that on normal knees was 20 minutes;
结果发现：（1）患者组骨内造影剂平均排空时间为35分钟，正常组为20分钟；
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