2021年翻译资格《英语三级笔译》英译汉：动力下降

动力下降

powered descent

　　At 10:57 p.m. on December 1, the lander-ascender combination of Chang'e-5, from about 15 km above the lunar surface, started a powered descent with a variable thrust engine ignited. Its relative vertical velocity to the moon was lowered from 1.7 km per second to zero.

　　The probe was adjusted and approached the lunar surface during the descent. After automatically detecting and identifying obstacles, the probe selected the site and touched down on the north of the Mons Rumker in Oceanus Procellarum, also known as the Ocean of Storms, on the near side of the moon.

　　12月1日22时57分，“嫦娥五号”探测器的着陆器和上升器组合体从距离月面15公里处开始通过可变推力发动机实施动力下降，逐步将探测器相对月球的纵向速度从1.7公里/秒降为零。

　　期间，探测器进行快 速姿态调整，逐渐接近月表;此后进行障碍自动检测，选定着陆点后，平稳着陆在位于月球正面风暴洋的吕姆克山脉以北地区。

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