Economic models often lead to the study of systems of equations.

Section 7.2 contains a resume of the fundamental equations.

第7.2节包括那些基本方程的摘要.

To derive the transformation equations , we return to Fig. 14-1.

为了求出这个变换式, 我们回顾图14 - 1.

The characteristic equations of the two equations are identical.

两方程对应的特征方程是恒等的.

Equations are generally written with a two-bar equals sign.

等式通常用两道横的等号来表示。

Such steps mean the simultaneous solution of either two linear equations.

这样的步骤意味着同时求解两个线性方程.

Even in this case the equations of motion cannot be integrated exactly.

即使是在这种情况下,运动方程也是不能精确积分的.

Singapore, which is close to the equator, is hot.

靠近赤道的新加坡非常热.

Amelia and Fred headed south toward the equator.

阿米莉亚和弗雷德向南方的赤道飞去.

Our spinning planet is heated strongly at the equator, feebly at the poles.

我们这个旋转着的行星在赤道处受热很强烈, 而在两极很微弱.

The equator engirds the earth.

赤道环绕地球.

All the planets orbit the Sun in roughly the same plane, round its equator.

所有的行星大致在同一平面上绕太阳赤道运转。

The equator divides the globe into two halves.

赤道把地球分成两半.

The equator divides the earth into two hemispheres.

赤道把地球划分成为两个半球.

All seventeen varieties of the bird are found below the equator, primarily in Antarctica.

所有17种企鹅都在赤道以南, 主要在南极洲.

Upper air currents are driven across the Pacific Ocean astride the equator.

高空环流被驱使着,运动在横跨太平洋水域的赤道上.

Knows ( Those ) from south of the [ equator ] come to the United States during the northern winter.

那些来自赤道 以南 的学生在北方的冬天来到美国.

Those from south of the equator come to the States during the northern winter.

那些来自南部赤道附近的学生每到北方的冬天都来到美国.

GPS operates best near the equator.

全球定位系统在赤道附近性能最好。

Line of latitude refers to the small circles parallel to the equator in the map.

地图上所有与赤道平行的较小圆周线,都称为纬线.

Voyager Two also found a giant storm south of Neptune's equator.

旅行者2号还发现海王星赤道以南有巨大的风暴.