Now you know why General Motors has introduced expensive Saturns and cheap Cadillacs.

现在，你知道通用汽车为什么会推出昂贵的土星和便宜的凯迪拉克了吧，更不用说该公司旗下其他品牌所犯下的种种错误。

But because the Saturns would rise at different times every night, the hypothetical alien civilization would have a hard time using its companion planets to tell time or create a calendar.

但由于木星每天晚上升起的时间不同，这些想象中的外星人，将很难划定时间，或制订日程表。