需要液晶显示身份证号码，测试数据和各种指示状态的符号。
The LCD display is designed on the basis of the display need.
树上涂的那些白色的符号是用来指示行进路线的。
The white marks painted on the tree are used to show the route.
参照符号（用以指示读者参看脚注等来找到信息）。
What task information do you want to display with your milestone symbols?
参照符号（用以指示读者参看脚注等来找到信息）。
What task information do you want to display with your milestone symbols?
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