A top design official at the time, Boris Chertok, wrote in his memoirs that "Judging by modern standards of rockets reliability, we had no reasons for optimism by April 1961."
一位高级设计师Boris Chertok在他的回忆录中写到“以现代火箭可用性来评估的话，我们实在没有理由对1961年4月那次发射那么乐观。”
Memoirs lack the weight of official documents, Petrov noted, but Serov also described reading a Wallenberg file.
彼得罗夫指出，回忆录缺乏官方文件的份量，但谢罗夫也描述了他读到的一份有关瓦伦堡的文件。
The number of official and local histories, memoirs and gazetteers containing military data is vast, although only a tiny pro-portion is yet available in translation.
官方修订的历史和地方志、回忆录、邸报含有大量关于军事的内容，尽管这其中只有极少的部分已经过翻译。
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