It's only when the first radar observations to the surface of Mercury were obtained, back in the 90s.
早在90年代,只有第一个观测水星表面的雷达获得过。
单词 | radar observation |
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原声例句
自然百科 It's only when the first radar observations to the surface of Mercury were obtained, back in the 90s. 早在90年代,只有第一个观测水星表面的雷达获得过。 VOA常速英语_美洲 Scientists based their findings on more than 100 radar observations by the Mars express mission from 2010 to 2019. 科学家们的发现是基于2010年至2019年" 火星快车" 任务对100多个雷达进行的观测。 |
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