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。

If they looked up, they would see the two Saturns crossing the sky every 1.6 days, appearing half as large as the moon.

这些外星人仰望天空时，他们将会看到两颗土星每隔1.6天，交替在天空中划过，大小只有月亮的一半大。

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。