在借助望远镜观察奇妙壮观的土星时，17世纪的天文学家乔凡尼·多美尼科·卡西尼知道他找到了一项可以为之付出毕生努力的伟大事业。
When the 17th century astronomer Giovanni Domenico Cassini stared through a telescope at mighty Saturn, he knew he had found his life's great work.
在借助望远镜观察奇妙壮观的土星时，17世纪的天文学家乔凡尼·多美尼科·卡西尼知道他找到了一项可以为之付出毕生努力的伟大事业。
When the 17th century astronomer Giovanni Domenico Cassini stared through a telescope at mighty Saturn, he knew he had found his life's great work.
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