Fusion in a star's core produces heat and outward pressure, but this pressure is kept in balance by the inward push of gravity generated by a star's mass.

恒星核心中发生的核聚变产生热能与向外的压力，不过这份压力由恒星质量所产生的内向重力抵消了。

youdao

So you saw in a striking example of where friction helped us to balance, and now I want to discuss an object that is hanging and that can freely swing due to gravity.

这就是著名的靠，摩擦力平衡的例子，现在我想讨论一个，可以在重力作用下，自由摆动的悬挂物体。

youdao

The control system automatically regulates the buoyancy force of the gasbag according to parameters of a sensor, so as to achieve the gravity balance and energy-saving flight of the whole aircraft.

控制系统根据传感器参数自动调节气囊的浮升力，达到整机的重力平衡和节能飞行。

youdao

These not only are able to determine the strength with which a subject is able to push off with but can also determine their center of gravity and balance.

ENGADGET: vi-RABT improves ankle rehabilitation with virtual reality and robotics