这个图标是一个包含十字的方框，扩展图表以显示集合的完整时间范围。
This is the cross inside a box icon and expands the chart to show the full timeframe of the collection.
上面的图表显示了来自世界卫生组织的常规情况报告和病人数据库的病例数据，且后者倾向于更准确，但最近几周的数据却不太完整。
The chart above shows Numbers from both the WHO's regular situation reports and from patient databases, which tend to be more accurate but are less complete for recent weeks.
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