威利·雷就像是那个年代的卡尔·萨根(1934 - 1996美国天文学家、科普作家)，他总在孜孜不倦地宣传太空探索，把他的想象详尽地告诉大众。
Willy Ley was the Carl Sagan of his day, tirelessly popularizing space exploration and bringing his vision to the public at large.
在整个科普体系中，调查问卷是许多科普理论探索与科普实践的基础。
The questionnaires are the basis of theoretical exploration and practice in the whole system of science popularization.
在整个科普体系中，调查问卷是许多科普理论探索与科普实践的基础。
The questionnaires are the basis of theoretical exploration and practice in the whole system of science popularization.
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