英文原文：
Important note for visual observers: to allow for detailed analysis, please report the Leonid activity in short intervals. Try to avoid more than 5 to 10 Leonids per interval, and in any case avoid intervals longer than 10-15 minutes throughout November 17. Even when the activity appears poor due to low radiant elevation or bad weather, you may unknowingly be observing an outburst which requires high-resolution data.
置顶卡
变色卡
千斤顶
显身卡