In the Soviet Union, sightings of UFOs were often prompted by tests of secret military rockets.

在苏联，U FO目击常常被认为是秘密的军事火箭测试。

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This collection included, by the way, a series of 175 stamps with portraits of cosmonauts, rockets, and dogs, issued from '57 on, in honor of the Soviet space program.

顺便说一下，这个集邮本包括一套从1957年积攒下来的庆祝苏联航天计划的邮票，宇航员、火箭、狗的肖像一应俱全，总共175枚。

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Thereafter, America vied with the Soviet Union for supremacy in aerospace's equivalent of "mine's bigger than yours", as successively taller rockets lobbed larger payloads further afield.

从此以后，美苏展开了对太空霸权的竞争，不停地追求“更大”：更高的火箭携带更多的有效载荷到达更远的空间。

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Many Malian officials say they believe rebels are refashioning Soviet rockets trafficked from Libya into dangerous land mines.

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He belongs to what was once the Soviet intelligentsia, and is more interested in business than rockets.

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Other primates and mice followed, and the Soviet Union a few years later joining the animal space race when nine dogs went skyward aboard rockets.

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