Tom is a student and he can buy a fitness band for 640 yuan.

汤姆是一个学生，他可以花640元买一个健身带。

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In other words, it does everything that a proper fitness band is supposed to do.

换句话说，它会做一个适当的健康追踪器应该做的一切。

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On a genetic level, the finding that members of a band are not highly interrelated means that “inclusive fitness cannot explain extensive cooperation in hunter-gatherer bands, ” the researchers write.

从基因角度讲，狩猎组合中的成员并没有高度的血缘关系的发现意味着“广泛的适应并不能解释狩猎-采集组合中的高度合作”，研究人员写道。

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First, the Smart Activity Tracker is compatible with both iOS and Android using the Fitness Band app to track, monitor and share your fitness habits (no big surprise given LG's handsets run Google's OS).

ENGADGET: LG's Smart Activity Tracker wields a swipeable touchscreen and smart TV apps, we go hands-on (video)

Fitness trackers like the Nike Fuel Band and the Fitbit are already hugely popular.

CNN: 'Smart fork' may help you lose weight

If you've been monitoring the fitness-tracking space, but have been holding out for a band that offers just a little extra, then it's worth considering the Flex.

ENGADGET