Youngsters on Canadian farms wear radio tags on bracelets to signal their proximity to adults operating heavy machinery.

生活在加拿大农场上的小孩会佩戴带有无线标签的手镯，这样操作重型机械的家长就能通过信号知道孩子离他们有多远。

Right now we're putting radio tags on the penguins, to track when the penguins go out to find food, and when they come back.

现在我们正在给企鹅贴上无线电标签，跟踪它们什么时候出去觅食，什么时候回来。

In March last year 20,000 school children in the Brazilian city of Vitoria da Conquista had radio tags sewn into their uniforms to help detect truants.

去年3月，巴西维多利亚达孔基斯塔的一些学校在两万名学生的校服上缝上了无线标签，这样就能找出那些旷课的学生。

An explosion of new technology in the past ten years from motion-activated camera traps to microphone monitors and radio tags, which is helping ecologists to track, measure and protect life on Earth.

在过去十年里，新技术突飞猛进，从动作感应摄像机陷阱到麦克风监视器和无线电标签，这些技术帮助生态学家追踪、测量和保护了地球上的生物。