Belgian officials also released a photo taken from closed circuit TV of three men with luggage carts.

比利时政府公布了当时推着行李车的三名疑犯的照片，这些照片是从监控中提取的。

And so what happened right when he closed that circuit?

那么当他闭合那个电路时发生了什么？

Well the magnetic field before he closed the circuit was zero.

在他闭合电路之前，磁场为零。

Some schools have modern teaching equipment, like computers and closed circuit television, but there are also small country schools, with just one classroom.

有些学校有现代化的教学设备，像计算机和闭路电，有的只有一间教室的乡村学校。

Judge Sybil Elias is weighing whether to free or detain a man who appears in the county jail by closed circuit.

法官西比尔·伊莱亚斯正通过闭路电，权衡是否释放或羁押出现在县监狱的这名男子。

Placing a finger on the Digital Crown creates a closed circuit with electrodes on the back, providing data the ECG app uses to analyze your heart rhythm.

将手指放在数码表冠上，表冠背后的电极会形成一个闭合线路，生成心电图App所需的数据，继而分析你的心率情况。

Along with her husband's help, what ended up being kind of the first closed circuit TV system and home security system in the 1960s.

在丈夫的帮助下，她最终创造出了20世纪60年代首个闭路电系统和家庭安全系统。

In addition, there would be a resource room in which audio visual equipment and other equipment of that sort could be stored. Finally, there would be a seminar room with closed circuit television.

此外，还会有一间资源教室，里面可以安装听设备和这一类型的其他设备。最后，还会有一间装有闭路电的会议室。

Additionally, it has a closed circuit television camera to keep an eye on the placement of the slung load in order to defend itself against ballistic missiles.

此外，它还配备了一闭路电摄像头，用来监控悬吊负载的位置，以防御弹道导弹。

So the premise here is that there is a closed circuit rodeo, which means, like, it's sort of a People enter the rodeo and then the last man standing wins a million dollars.

所以这里的想法是有一个封闭电路的牛仔竞技表演，意思是人们进入竞技场， 最后剩下的那个人将赢得一百万美元。