The principle of medicine reducing weight is to stimulate the central nervous to suppress appetite, thus reduce eating, reaches to the result reducing weight.

减肥药的原理是刺激中枢神经以压抑食欲，从而减少进食，达至减肥效果。

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To move down through the mountain it is important that you go down slowly, thus it becomes a necessity for mountain bikes to use heavy weight materials so as to reduce the speed of the vehicle.

要下移，通过山，重要的是你慢慢下降，由此，成为一种必要的山地自行车使用重的材料，以降低车速的车辆。

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Lower turbines should, together with clever design and material selection, help reduce the turbines' weight, and thus their need for ballast, which in turn should reduce sub-sea costs.

BBC: Floating challenge for offshore wind turbine

Manufacturers have thus been pursuing designs that reduce the size and weight of 3D cameras and seeking ways to shorten their development period.

ENGADGET: Sharp busts out world's first 3D HD camera for mobile devices