正方形

The tightly knit body approximates a square measured from withers to ground and point of shoulder to point of buttock.

身体紧凑，呈正方形比例，体长（从肩胛前端到臀部末端的距离）与肩高相等。

If m = n, the matrix is square, and the number of rows is the order of the matrix.

如果m=n，矩阵是正方形的，行的数量即矩阵的序。

A square matrix whose determinant is not zero.

决定因素是零的正方形矩阵。

Matrix must be square.

矩阵必须是正方形的。。。。

A square matrix whose determinant is zero.

决定因素是零的正方形矩阵。

Social accounting matrix is a kind of national accounts represented by a square matrix which reflects all kinds of relations among the social agents. However, the SAM is generally constructed on the basis of the system of national accounts published in 1993, so it doesn't illuminate the contribution of resource and environment to economic growth and vice versa.

摘要社会核算矩阵是"以正方形矩阵表示的国民经济核算账户，它反映了一定时期内社会经济主体间的各种联系"，但目前的社会核算矩阵的编制多参照93年国民经济核算体系的中心框架，没有体现自然资源和生态环境对经济发展的贡献以及各类活动对环境的影响等等。

Measure this square and tell me how much material is needed to cover it.

量一下这个正方形，然后告诉我需要用多少材料才能盖过它。

The photograph should measure 2 inches square (roughly 50 mm square) with the head centered in the frame.

照片的尺寸为2X2英寸(大约为50毫米X50毫米)正方形，头像居于正中。

Dendrite growth has been simulated with the phase field method and finite difference schemes on a two dimensional rectangular domain with a uniform square mesh.

采用相场模型和有限差分方法，模拟了过冷纯金属熔体的枝晶生长，计算区域为二维正方形均匀网格。

To improve the simulation accuracy and to make the increment of computation amount the smallest, the quantitative comparison was used to compare the effect of incident direction and difference accuracy on numerical dispersion with the changing of the ratio of horizontal and vertical gird. The results show that the rectangular grid is better than square mesh in suppressing dispersion and can avoid the low computational efficiency caused by high-order difference.

为提高模拟精度，同时又尽可能减少计算量，采用定量分析的方法，对比分析了横纵网格比变化时入射方向和差分精度等因素对数值频散的影响，分析结果表明，矩形网格较之正方形网格能更好地压制频散，同时可以避免高阶差分导致的低计算效率。

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。