Usually, an occultation lasts only about an hour, but this time it was an unusual 12-hour marathon.
Usually, an occultation lasts only about an hour, but this time it was an unusual 12-hour marathon.
通常这种情况只持续约1小时，但这一次是不寻常的12小时马拉松。
Usually, an occultation lasts only about an hour, but this time it was an unusual 12-hour marathon.
通常这种情况只持续约1小时，但这一次是不寻常的12小时马拉松。