Most of maves are caused by the action of wind, it's better to use circular waves in the pond scence. we just talk about the directional waves.
大多数的波动是由于风吹动引起的，对于池塘中的水用圆形波更好一点，我们只讨论方向波。
2
To study nerve stem cell directional differentiation to cholinergic neuron by adjusting action of promote differentiation factors.
目的通过促分化因子的调节作用对神经干细胞向胆碱能神经元的定向分化进行探讨研究。
3
The scheme includes the transverse differential protection, the directional relay action on negative sequence power of fault component and the incomplete differential protection.