21 a.m., the transponder, which identifies the aircraft on radar, stops transmitting.

21时。检测雷达上飞机信号应答器停止传输信号。

Word came out yesterday from Malaysia's government that somehow the plane's transponder was turned off.

马来西亚政府昨日发布消息称飞机应答器处于关。

Surveyor : where are EPIRBs and SART?

无线电应急示位标和搜救雷达应答器在哪？

The transponder sends signals about altitude, locations and direction of a plane.

应答器发送高度、位置和飞机向信号。

" This is your transponder, " Peggy said, handing him the small device.

“这是你应答器，”佩姬说着，递给他一个小型设备。

Most birds in this wood carry transponders fitted to them after their capture in mist nets.

这片树大多数鸟曾被雾网捕获，携带有应答器。

The ship must have disabled its transponder.

那艘船肯定关掉了应答器。

SART is short for Search And Rescue Radar Transponder .

SART 是搜救雷达应答器缩写。

He also had a tiny transponder inserted under his skin so that he could be identified next time he was caught.

还在他皮肤下植入了一个微型应答器，这样下次被抓到时就可以辨认出他身份。

Then descend to 10, 000FT below, set transponder code to 7700.

然后下降到下面 10， 000FT， 将应答器代码设置为 7700。

Less than an hour after takeoff from Kuala Lumpur, Malaysia, the plane's transponder was either turned off or it just stopped working.

在从马来西亚吉隆坡起飞不到一个小时后, 飞机应答器要么被关或只是停止工作。

Most commercial drones are constructed of plastic and are difficult to spot electronically because they're small, fly low to the ground and don't carry a transponder to signal their positions.

而大多数商用无人机材质都是塑料，加上电子设备很难识别——无人机体型很小，贴近地面飞行，加之没有携带会暴露它们位置应答器。