它有两个头，两个脖子，四条手臂，八个手指和六条腿。
It has two heads, two necks, four arms, eight fingers and six legs.
这就像在你的脖子上放了两个西瓜（大约27公斤重）。
It's like putting two watermelons (about 27 kilograms) on your neck.
他们通过将一个装有GPS定位装置的项圈佩戴给北极熊后，研究员们就可以精确地捕捉到它在两个月内外出捕猎过程中的具体行为。 科学家们能够根据北极熊脖子上的项圈以及植入到它皮肤内的温度检测装置发送回来的数据来判断它是在水中还是再陆地上边。
By fitting a GPS collar to a female bear, researchers were able to accurately plot its movements for two months as it sought out hunting grounds.
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