We have to capture and anesthetize them so that we can install GPS collars around their necks and follow their movements, which is a technique used by many other conservationists around the world.
我们必须捕获， 然后麻醉它们， 这样我们就可以安装 GPS定位项圈在它们的脖子， 而且跟踪它们的行动， 这是世界各地很多自然环境 保护者使用的一种方法。