Grandet twirled his thumbs for four hours, absorbed in calculations whose results were on the morrow to astonish Saumur.

格朗台转动了四个小时的大拇指，全神贯注于计算，结果明天就会让索米尔大吃一惊。

You may see a cooper, for instance, sitting in his doorway and twirling his thumbs as he talks with a neighbor.

例如，您可能会看到一个桶匠坐在他的门口，一边与邻居交谈，一边转动拇指。