thrust of earth

In this paper, the problem of orbital design of landing moon detector is discussed which starts from near earth circular parking orbit, produces thrust in velocity direction, entries landing moon orbit, and hits the moon with on guiding and free flight.

讨论了探测器从低高度圆型地球停泊轨道出发，沿速度方向施加脉冲推力进入登月轨道，不加制导自由飞行击中月球的轨道设计问题。

Based on the deformation of earth and tire during the moving of a wheel earth moving machine, the formation of the thrust of the earth and rolling resistance is analyzed, and the tractive ability of the machine is formularized.

本文根据轮式铲土运输机械行驶时地面和轮胎的变形，分析土的推力和滚动阻力的形成，并用公式表示出轮式铲土运输机械的牵引能力。

Thrust a rod from its last shoot down the stem; it shall point to the center of the earth as long as the tree lives.

从它初发的嫩枝旁沿茎插一根笔直的杆子，只要这树活着，杆子将一直指着地的中心。

Determination of passive thrust for non-horizontal earth surface before retaining structure

挡土结构前非水平面时嵌入段被动土压力的确定

After the first stage burns out, it falls back to earth along a parabolic path, while the engines of the second stage fire to thrust the rocket into an earth orbit.

当第一级烧毁后，沿抛物线的轨道落到地球，而第二级的发动机点火把火箭发射到地球轨道。