未知数消去法

Through the C language to achieve Gaussian elimination method, the basic idea is to eliminate every time an unknown, the original equation into the equivalent of the triangle equations.

详细说明：通过C语言实现高斯消去法，基本思想是每次消去一个未知数，把原来的方程化为等价的三角形方程组。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。