No one comes with a clear historyButton, so you have to accept their past.
没有人身上安装着清除历史的按钮，所以你得接受他们的过去。
2
You can use the Historybutton in the previous panel to display historical data about how the indicators of a group evolve over time. Historical data is plotted on line charts showing.
通过先前面板中的History按钮可以显示关于组的指示器如何随着时间而变化的历史数据。
3
Race has always been a hot button in this country's history.