一旦此调用针对当前时间步长返回，就可以清空上一步长施加到这些物体上的力，然后获得动态物体的当前方位和角度。

Once the call returns for the current time step, you clear the forces applied to the objects from the last step, and then get the current position and Angle of your dynamic body.

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并在考虑海冰中短期变化规律的基础上，对太阳短波辐射、净长波辐射及海洋热通量，提出以日平均量代替一个时间步长内的平均来进行处理的方法。

And the solar short wave radiation, net long wave radiation and ocean heat flux are all used with a daily mean for every time step based on the sea ice mid-short range variation characteristics.

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然后引入新的步长函数空间，并在这个空间上，采用变分近似法讨论该格式的稳定性问题。

Then the new step function space is introduced and stability problem for the finite difference scheme is discussed by means of variational approximation method.

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