The moon's gravity is a sixth as strong as the earth's, so Chang'e-4's experiment was a test: would the earth plants know which way was up on the moon?
月球的引力是地球引力的六分之一，所以嫦娥四号的实验是一个测试：地球上的植物能知道月球上哪个是向上的方向吗？
The mission was planned as a low-Earth orbit to test the Lunar Module, the lander later used by Apollo 11 and subsequent missions to land on the moon's surface.
他们的使命只是做地球低轨道飞行，以测试月球舱和阿波罗11号以及以后的登月任务所使用的登月舱。
Yet the destruction of the Chinese Fengyun-1C in an anti-satellite missile test in 2007 accounts for more than a quarter of all catalogued objects in low-Earth orbit.
中国在2007年进行了反卫星导弹试验，风云一号卫星被摧毁。由此产生的太空碎片使记录在册的近地轨道物体增加了四分之一强。
Making a splash: Engineers conduct a water-drop test of Orion, which will land in the sea when it returns to earth.
轰动消息：工程师们在对返航时将会在海上着陆的“猎户号”进行水滴测试。
That test spread debris in an area around the Earth filled with other satellites, endangering those machines.
这次试验产生的碎片散布在绕地轨道的某个布满卫星的区域中，给那些卫星带来的危险。
It is also a test for new technology which could be used to return other space samples to Earth in the future.
这也是对未来用作回收其他太空样本返回地球的新技术的一次验证。
Is there any relationship between the date of the EAS test and the passage of an asteroid passing between the Earth and Moon?
紧急报警系统测试的日期与小行星从地球和月亮之间穿过之间有什么关系么？
Let us test Kepler's third law for the orbit of Uranus compared with that of earth.
让我们比较天王星和地球的轨道，来检验一下开普勒第三定律。
The greatest test of courage on earth is to bear defeat without losing heart. — R. GIngersoll.
世上对勇气最大的考验就是以不屈的心态承受失败。
Here is a test to find whether your mission on Earth is finished, if you are alive, it isn't.
这里是一个测试你是否找到地球任务完成了，如果你是活着，不是。
The inner earth pressure of buried cylindrical structure was measured by model test. The variations of inner earth pressure during overturning of cylinder are analyzed.
采用模型试验实测圆筒结构筒内土压力，并对圆筒在倾覆过程中筒内土压力的变化规律进行探讨。
The earth simulator is an important ground simulation test and precision calibration equipment for infrared earth sensor which is the key component in the satellite controlling system.
地球模拟器是卫星姿态测量控制关键部件—摆动扫描式红外地球敏感器的一种重要地面模拟试验与精度标定仪器。
Do not touch any object that could provide a current path to the common side of the circuit under test or power line (earth) ground.
请勿接触任何会为通向被测电路的共用侧或电源地的电流提供通路的物体。
At present, four methods are mainly used for reinforcement earth research: prototype test, model test, three-axial compression test, direct shear test and drawing test.
目前加筋土的试验研究主要有四种方法：原型试验、模型试验、三轴压缩试验、直剪试验和拉拔试验。
The greatest test of courage on earth is to bear defeat without losing heart. Rejoicing in hope, patient in tribulation.
对勇气的最大考验莫过于忍受失败而不丧失信心。从希望中得到快乐，在磨难中保持坚韧。
In missile test, the transformation methods from earth rectangular coordinate to geodetic coordinate are often used.
在靶场试验任务中，经常要用到地心直角坐标到大地坐标的转换算法。
Through the artificial freezing earth simulation test, the physical and mechanic variation laws of the freezing structure are gained.
主要是通过人工土冻结模拟试验，得出冻土结构物的物理力学变化规律。
The results of field test indicate that the earth pressure of abutment, different from linear distribution of Coulomb's, acts as parabolic type.
现场测试结果表明，台背土压力大致呈“抛物线型”分布，与库仑土压力理论的线性分布不同。
It has been proved, through field-measured data and model test results, that trench width has much effect on vertical earth pressure on trenched flexible pipes such as steel pipelines.
开槽埋设钢管等柔性管时，开槽宽度对于作用于管道上的竖向土压力有着很大的影响，这已被现场实测和模拟试验结果所验证。
Another test, involving the precession of a gyroscope in a satellite circling the earth, is scheduled for the 1970s.
七十年代还安排了另一实验，它包括绕地球旋转的卫星中的陀螺进动性试验。
In the condition of industrial production, orthogonal test and slab rolling comparison test were had by adding different rare earth element and alloying element.
在工业生产条件下，通过添加不同的稀土元素和合金元素进行正交试验及板坯轧制对比试验。
The results of mechanical test show that is bending strength, toughness against impact and void ratios can be improved after the rich iron matris is added with rare earth.
力学性能测试结果表明：添加稀土的富铁胎体及其金刚石复合材料的抗弯强度、冲击韧性和孔隙度均有明显的改善。
In the loose model test, we can not only consider the nonlinear of the earth and rock-fill deformation, but also realize the seepage.
在松散体模型试验中，不仅可以考虑土石变形的非线性，而且可以实现渗流，地震荷载亦可作为体积力处理。
Corrosion test shows that proper rare earth addition enhance the general corrosion sensitivity.
腐蚀试验表明，添加微量稀土元素可增强抗点腐蚀敏感性。
The results show that the laser surface melting treatment improves greatly the homogenization, compaction and the corrosion resistance of rare earth permeating layer under the condition of test.
结果表明，在一定条件下，激光熔凝处理可进一步提高纯铁渗稀土层组织的致密性与均匀性，显著提高稀土渗层的耐蚀性。
The greatest test of courage on earth is to bear defeat without losing heart. ---R.
世上对勇气最大的考验就是以不屈的心态承受失败。
The greatest test of courage on earth is to bear defeat without losing heart. ---R.
世上对勇气最大的考验就是以不屈的心态承受失败。
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